Beginner advice

How to play

You should learn most important principles of a chess game. That will give you a solid understanding of a chess game and you will know what to do in every position. Then, you should optimize your calculation so you don't miss tactics in your games. Your rating will skyrocket. I can help you with all of this. Message me if you are interested.

from another beginner here, learn the basic principles. seeing you have platinum flair, try puzzles as well. theyve helped me a bit. i've also gotten a bit of help from various youtube videos. playing against bots, doing lessons, and just general practice also helps me.

i wish you luck :]

Mine would be "use your time to think, try to play good moves".

Let's look at a game:

Your opponent (white) played 2. Qh5 and 3. Bc4. What is he up to? Is there any threat? Who cares, let's just bang out a random move in 2 seconds, it will surely be fine.

^ strong agree. ive found myself having a harder time with this in 10min games, so if that's also a problem you have, i recommend longer time controls. i personally like 15|10 the best.

Become a noob

You are unlikely to get better at chess by playing exclusively speed chess.  You would increase your chances of getting better at chess if you were to....

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.  And/or hoping to notice and exploit your opponent’s blunders while hoping they don't notice yours.  The reason for this is that in speed chess 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 and results.  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 or daily time controls, but they should be a significant percentage of your games, at least as much, if not more so than speed games which, while they may be fun, 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

Learn what you should be doing...

Improving Your Chess - Resources for Beginners and Beyond
https://www.chess.com/blog/RussBell/improving-your-chess-resources-for-beginners-and-beyond

https://www.chess.com/blog/RussBell