How to play better

I have a 600 blitz rating. Forever I'm moving in pieces in board and losing. I have 1100 in rapid, but this beacuse opponents are weak like me. But in blitz I'm suck. How to improve?

"... Sure, fast games are fine for practicing openings (not the most important part of the game for most players) and possibly developing decent board vision and tactical 'shots', but the kind of thinking it takes to plan, evaluate, play long endgames, and find deep combinations is just not possible in quick chess. … for serious improvement ... consistently play many slow games to practice good thinking habits. …" - NM Dan Heisman (2002)

https://web.archive.org/web/20140627052239/http://www.chesscafe.com/text/heisman16.pdf

"... for those that want to be as good as they can be, they'll have to work hard.
Play opponents who are better than you … Learn basic endgames. Create a simple opening repertoire (understanding the moves are far more important than memorizing them). Study tactics. And pick up tons of patterns. That’s the drumbeat of success. ..." - IM Jeremy Silman (December 27, 2018)
https://www.chess.com/article/view/little-things-that-help-your-game
https://www.chess.com/article/view/how-to-start-out-in-chess

https://www.chess.com/article/view/how-to-play-chess

https://www.chess.com/blog/michechess89/8-tips-to-increase-your-online-rating

https://www.chess.com/news/view/rapid-chess-improvement
https://www.chess.com/news/view/a-new-years-resolution-improve-your-chess-with-new-lessons

https://www.chess.com/article/view/mastery-chess-lessons-are-here
"... In order to maximize the benefits of [theory and practice], these two should be approached in a balanced manner. ... Play as many slow games (60 5 or preferably slower) as possible, ... The other side of improvement is theory. ... This can be reading books, taking lessons, watching videos, doing problems on software, etc. ..." - NM Dan Heisman (2002)
https://web.archive.org/web/20140627084053/https://www.chesscafe.com/text/heisman19.pdf
"... If it’s instruction, you look for an author that addresses players at your level (buying something that’s too advanced won’t help you at all). This means that a classic book that is revered by many people might not be useful for you. ..." - IM Jeremy Silman (2015)
https://www.chess.com/article/view/the-best-chess-books-ever
Here are some reading possibilities that I often mention:
Simple Attacking Plans by Fred Wilson (2012)
https://web.archive.org/web/20140708090402/https://www.chesscafe.com/text/review874.pdf
https://dev.jeremysilman.com/shop/pc/Simple-Attacking-Plans-77p3731.htm
Logical Chess: Move by Move by Irving Chernev (1957)
https://web.archive.org/web/20140708104437/https://www.chesscafe.com/text/logichess.pdf
The Most Instructive Games of Chess Ever Played by Irving Chernev (1965)
https://chessbookreviews.wordpress.com/tag/most-instructive-games-of-chess-ever-played/
Winning Chess by Irving Chernev and Fred Reinfeld (1948)
https://web.archive.org/web/20140708093415/https://www.chesscafe.com/text/review919.pdf
Back to Basics: Tactics by Dan Heisman (2007)
https://web.archive.org/web/20140708233537/https://www.chesscafe.com/text/review585.pdf
https://www.chess.com/article/view/book-review-back-to-basics-tactics
https://static1.squarespace.com/static/5856bd64ff7c50433c3803db/t/5895fc0ca5790af7895297e4/1486224396755/btbtactics2excerpt.pdf
Discovering Chess Openings by GM John Emms (2006)
https://web.archive.org/web/20140627114655/https://www.chesscafe.com/text/hansen91.pdf
Openings for Amateurs by Pete Tamburro (2014)
https://kenilworthian.blogspot.com/2014/05/review-of-pete-tamburros-openings-for.html
https://chessbookreviews.wordpress.com/tag/openings-for-amateurs/

https://www.chess.com/blog/ForwardChess/book-of-the-week-openings-for-amateurs
https://www.mongoosepress.com/catalog/excerpts/openings_amateurs.pdf
Chess Endgames for Kids by Karsten Müller (2015)
https://chessbookreviews.wordpress.com/tag/chess-endgames-for-kids/
https://www.gambitbooks.com/pdfs/Chess_Endgames_for_Kids.pdf
A Guide to Chess Improvement by Dan Heisman (2010)
https://web.archive.org/web/20140708105628/https://www.chesscafe.com/text/review781.pdf
Studying Chess Made Easy by Andrew Soltis (2009)
https://web.archive.org/web/20140708090448/https://www.chesscafe.com/text/review750.pdf
Seirawan stuff:
https://seagaard.dk/review/eng/bo_beginner/ev_winning_chess.asp?KATID=BO&ID=BO-Beginner

https://web.archive.org/web/20140708090229/https://www.chesscafe.com/text/review492.pdf
https://www.nystar.com/tamarkin/review1.htm
https://web.archive.org/web/20140627132508/https://www.chesscafe.com/text/hansen173.pdf

https://www.chess.com/article/view/book-review-winning-chess-openings

https://www.chess.com/article/view/book-review-winning-chess-endings
https://web.archive.org/web/20140708092617/https://www.chesscafe.com/text/review560.pdf

Thank you very much!

@kindaspongey's copy and pasting at your service

But seriously spongey... Do you hang around the forum all day waiting for people to ask such questions so you can quickly copy and paste all that stuff that you copy and paste? Do you ever offer advice of your own?

The same song and dance. 

Play slow time controls. 

Enter Kindaspongey----------------------------------------------------------->

He does offer his own advice.  He answers a question with a question.

Improving Your Chess - Resources for Beginners and Beyond...

https://www.chess.com/blog/RussBell/improving-your-chess-resources-for-beginners-and-beyond

Play Longer Time Controls...

For many at the beginner-novice level, speed chess tends to be primarily an exercise in moving pieces around faster than your opponent while avoiding checkmate, in hopes that his/her clock runs out sooner than yours.  Or being fortunate enough to be able to exploit your opponent’s blunders before they exploit yours.

There is little time to think about what you should be doing.

It makes sense that taking more time to think about what you should be doing would promote improvement in your chess skills.

An effective way to improve your chess is therefore to play mostly longer time controls, including "daily" chess, so you have time to think about what you should be doing.

This is not to suggest that you should necessarily play exclusively slow time controls or daily games, but they should be a significant percentage of your games, at least as much, if not more so than speed games which do almost nothing to promote an understanding of how to play the game well.

Here's what IM Jeremy Silman, well-known chess book author, has to say on the topic...
https://www.chess.com/article/view/longer-time-controls-are-more-instructive

And Dan Heisman, well-known chess teacher and chess book author…
https://web.archive.org/web/20140627052239/http:/www.chesscafe.com/text/heisman16.pdf

https://www.chess.com/blog/RussBell/dan-heisman-resources

and the experience of a FIDE Master...
https://www.chess.com/forum/view/general/how-blitz-and-bullet-rotted-my-brain-don-t-let-it-rot-yours

how do I change the player level when playing daily or live chess?

Is there a 1. Beginner 2. Intermediate 3. Advanced 

Setting for each of Daily Chess (or) Live Chess 

How do I know what my friends set my CHESS SKILL LEVEL at?

Need Immediate assistance.

Under Settings menu....click on Daily Chess or Live Chess....within these you can set the opponent's skill levels.