want to improve


First of all, would you say you are an underrated or overrated chess player? If you started playing and you STARTED at around 1200 ELO and lost some games, you might be rated closer to 1100. The best way to climb the ELO ladder is to play some unrated games and focus on skill level. Play some of the bots that chess.com has to offer. Practice is crucial. When you feel ready, then try to play some rated games and see how you do. If you have any questions or if my advice didn’t work out, please message me. I will be more than happy to help you. As always, thanks! :)

Learn exactly how to think in the opening, middlegame and endgame — this is what I teach.
Always blunder-check your moves.
Solve tactics in the right way.
Analyze your games.
Study games of strong players.
Learn how to be more psychologically resilient.
Work on your time management skills.
Get a coach if you can.

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