moving your pawns from in front of your knights can be very powerful if you’re moving your bishop to where they were because your bishop essentially cuts the board in half and contributes to your own center control.
Lichess ratings are a bit inflated, so you should subtract 200-300 from your rating to begin with. And then, I would say probably 2000 is a good area to start, you wanna go into tournaments with enough knowledge to do well