Edit: guys, respectively, I’m not interested in any styles other than 5a and 1a rn, so please don’t give me suggestions on what to learn, just pick if I should start playing 1a. Thank you!
Being better at 1A makes every xdiv easier to pick up and progress in. It’s why the best 1A players always tend to be competent at all the xdiv styles despite not playing them much if ever.
Skill transfer is huge in yoyo. If you build a stronger 1A foundation, then picking up and progressing in all xdivs will be a lot easier.
You don’t need to do anything of course, you can just do whatever is fun. But it seems like you’re trying to approach this from the perspective of a competitive player who wants to get very good and do it in an efficient way. If that’s your goal, then working on your 1A will be very beneficial. I don’t think there’s a single good competitive xdiv player who isn’t also very skilled in 1A.