Getting back into ranked, plz help

Hey folks,

Getting back into ranked after 5 year break. Enjoying the game (ranked seems more toxic than I remember but I can turn chat off so w.e.)

I used to be D1 filler (which meant support 2/3rd of the time) and I was wondering if now a days being filler is viable or should I focus on 2 roles only? I have fun playing every role and I'm nearly equally good at them all (bot Lane strongest). I tend to solo play only in ranked.

Any advice for a returning ranked player is greatly appreciated!!