Bullet

Hello any tips?

Yes. Don't play it.

what yours ranking for saying that?

Playing bullet in low elo is kinda hard. But u should at least learn some basic openings so you can play a bit faster. And do not blunder your queen of course

Up , almost 800in ranking 

Never played bullet, Don't see the point. There are plenty of other video games to test your quick reactions and dexterity. Chess is not meant to be played without thinking.

Bullet sucks to be fair.

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

I need help with my time managment

what you guy think of this ? https://www.chess.com/blog/cechcec/anti-gaming-bullet

This is an awful idea. There is probably a way to design a strategy that is even worse than this one, but right now I can't think of any. You waste time, you don't develop your pieces, you don't fight for the center and you create weaknesses everywhere.