New to tekken need an outline of what to learn/how to learn

I’m a 2D fighter player. Played lots of mvc3 injustice 2 and SfV and Sf6. I’m 1600 MR with my main in street fighter 6.

I started Tekken 8 with Jin, and didn’t lose a round from beginner to orange ranks just using basic punishes and launching into mash combos. I hit orange and immediately started losing (not every time, but frequently). I decided this was enough to teach me the basic “feel” now I want to learn more seriously. I decided to try out Law, but unlike Jin with him I’m not doing very well even at brawler, and I don’t know what to learn when or why or how. Any tips would be great. Thanks!