2000 rapid.

So it's going to require some positional training... Not many tricks, get to know a couple openings, keep solving puzzles, good luck lol

But I would probably recommend going for 100 points at a time... 2000 is a long shot right now

Learn and apply the most important principles of chess. - (core of my teaching)
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.

To improve your chess level, you need to work on all parts of the game — the opening, middle game and ending game. This is true on every level, and you should see where your weak spots are to work on more.

I'm rated around 2500 online on blitz/bullet, and I seem to be stuck.

Increase of 100-150 a year can be possible. Increase of 500 and above is impossible. Not unless you are super talented. I myself tried training very hard and I am a normal person. Now I am just trying to maintain. Might be training hard again just looking for momentum.

I went from 1000-1600 in 1 year, but then the next year only went from 1600-1700ish. It's hard to predict your growth trajectory. But one thing I do know is you gotta play actual games. I maybe averaged 1-2 games a day and i think i would have grown quicker if i played more. I think if you want to go 1500-2000 you probably need to play 5-10 rapid games a day and then try to also supplement that with tactics and studying master games.