Here are some tips from a 2200 rapid rated player:
- Get a teacher
- Study with different websites: Chessable....or even here on chess.com
- Read books on chess openings
- Practice in unrated chess games
- My last tip...stick to one opening or line for x amount of time, best 1 year...but 2 or 3 months would work too
How can I improve and master different chess openings