any tips for reaching rapid 1500





I suggest working a little on your openings if you haven't already. Playing openings you like and are familiar with can make the resulting middlegame positions more pleasant to play.
Also study some endgames. You will be reaching more and more endgames at this rating, so be prepared for them.
Good luck with 1500 rapid!

You aren't playing enough, play two games a day and then review them. Try to remember your mistakes and what worked for future. Stick with the same opening for white and same for black. That alone will take you to 1800



@Fetorenczi For the Sicilian, I personally like the Alapin because it is less theory-intense, but feel free to check out other variations.
You can probably find a lot of good opening tutorials on youtube.

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.

You should be learning new concepts. Tactics practice is good, and the other stuff you do is good, but it's hard to play better if you don't know how to play better. I recommend watching Naroditsky on youtube. You can just watch half of a video while you eat or something.

I wouldn't quit after a single loss. You may still be in good form. I would only quit playing in a session if you felt like stopping, not in good form, or tilting/sensing tilt.
Other advice I'd give is to try puzzle rush every now and then. Even if just once a week. Either the timed ones or puzzle rush survival; both have their benefits, but doing puzzle rush as a premium member is a good idea. You might as well use it since you have access to it.