I think it's probably best to take a break and come back later on (hiatus for anthology because it's anthology) The only ones I'm in that are still active seem to be anthology and trading academy.
I was only in like... a few and most of them ended up closing or super inactive (pairings closed, magica just vanished, big picture is super inactive, reflection is closed and trading academy moves super quick)
blinkingrunes After I left colors, I had a couple really slow TCGs (pairings and anthology) that I kept up because they were easy to handle but pairings closed so that keeps it easy.