I need your help. (Please)

In bullet it helps to know openings, because if you know openings you can play quicker. 

Play slower time controls. 15|10 is good.

The usual advice from beginners. 

Stop playing bullet. It is clear.

Yours and my brains don't work so fast. )

"Good" at chess is a relative term. Beginners consider me great at chess. People at my own level consider me OK at chess. Intermediate players consider me someone to watch out for. Strong players consider me with disdain. Great players think I'm a blithering idiot. The only people who are good at bullet are already extremely powerful players at regular time controls. I cannot imagine a player at 800 level even CONSIDERING bullet. That's like a person who rides his bike to the grocery store entering the Tour de France. Play slow time controls and forget that bullet even exists.

Hi! My name is Lauren Goodkind and I’m a respected  chess coach and chess YouTuber based in California: 

https://www.youtube.com/channel/UCP5SPSG_sWSYPjqJYMNwL_Q

Bullet is very tricky.   You might want to read a book on how to improve your bullet chess skills.

I believe that Hikaru Nakamura wrote a book on this.   

I know that pre-moving at the right times in games can save you lots of time.  

Good luck!  

Time Controls - Everything You Wanted To Know...

https://www.chess.com/blog/RussBell/time-controls-everything-you-wanted-to-know

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

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 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

There's a lot of qualified people here so maybe don't listen to me.

But if you're struggling with bullet chess probably just don't play it. Most games for beginners end by one player timing out anyways so it's mostly about playing fast.

Hmm, I would not call a rating between 201 and 516 "good at chess"... but if it is your oppinion, I have to accept it. And I would first try real longer games out, to learn the ever coming situations by heart and I would do more lessons and taktiks for the same reason. I personally have no interest in bullet, but I think the better you are in realising known patterns, the better you are in bullet.