the unpredictability of beginner games.
Go here in this blog called Chess Tips, Annotated Games, And Openings and check what you may be looking for and I’ll be updating this when I get the chance to. It may say unfinished, but that’s just a technical issue. Read this only for those people who know I am on ios I managed to make this because in a club I found a blog link and I clicked and I found the option to make a blog.
https://www.chess.com/blog/Jozonthe195/chess-tips-annotated-games-and-openings-unfinished
Are you playing blitz or rapid? Try playing 30 minute rapid. I tried it before and I made almost no blunders, I even got a brilliant move because of it.
Also during the middlegame (hardest part), you should go through the process of checking possible checks, possible captures, and possible attacks. This will help you find a good move.
Also, before moving a piece, just check every single opponent pawn and piece and see if they can see that square. I know it's much easier said than done, even I don't notice it sometimes, but it'll become a habit eventually.
I would recommend focusing on basic chess principles and prioritizing those over tactics. You really don't need tactics beyond basic forks if your rating is below 750. In fact, I think you can get up to 1000 without much tactical awareness.
So when I say basic principles, what I'm referring to is:
Fight for control of the center by placing a pawn in the center - two if your opponent doesn't fight you for it.
Develop your minor pieces (bishops and knights)
Castle your king to safety by move 10
Position your rooks on open files or supporting a pawn that you can push down the board
Chess is a team game - make sure everyone is participating. If you don't know what to do, try to better position your pieces.
All of these things need to become habits. From there, all it takes to win games is usually waiting for your opponent to blunder something and be able to see it and take advantage of it (and minimize your own blunders). Once you are up material, look for equal trades and try to trade down into a winning endgame.