Practica a lot!!!
how to improve in chess

study.....learn......there are no shortcuts in chess...
Improving Your Chess - Resources for Beginners and Beyond...
https://www.chess.com/blog/RussBell/improving-your-chess-resources-for-beginners-and-beyond

I improved a lot by playing a lot of rapid chess. I don't know if you consider my rating good but it was certainly worse

Forget about your rating, focus on improving. The rating will follow.
I see some people with high online blitz ratings that aren't all that good at chess. They have a good internet connection though.

I enjoy making lists:. Here is my get better at chess list:
Play puzzles
Take lessons
Watch games
Learn strategies ( names )
Play longer games
Play shorter games
Analyise games/ mistakes
Practice end game scenarios
Find a mentor
Play chess games, Consider every legal move you and your opponent can make. Make sure to save some time for the endgame then use it to visualize by calculating.

Here is a video I summarize the best way to actually improve your chess skills for free and for sure!
How to Analyze Your Own Chess Games || Chess Analysis Beginners || Improve Your Chess Rating Today
If you have any specific questions, make sure to ask and I will be happy to answer.
how to improve in chess and make my ratings good