how do you get a rapid 500

Try looking at the board before moving the pieces.

Based on your current rating of 496, win the next game against similarly rated players and you achieve 500.

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 get there by training and playing.

I am rated over 2400 online (https://www.chess.com/member/ppandachess). I created a free course that will teach you a training plan to improve. Feel free to check it out: https://www.panda-chess.com/daily-improvement-plan

Basically just don't blunder and you'll make it past 1000