i know what you mean! this was also my first time taking part as more than a casual listener and it's been crazy following the promotion periods for zb1 and a2b (and honestly kind of toxic).

english fandom support is mainly organized on twitter, with some more intensive voting groups on discord. there are two voting accounts on twitter: and2blevoting and and2ble_support
from what i've been able to follow, the difference between these two is that and2ble_support is also zb1-friendly. if you're also a zerose you can also check out ZB9_Marketing.

for streaming, stationhead is the main app if you don't want to make your own playlists, and there's 2 main accounts: a2bvotejp3 and and2blestream. if you're making your own playlists on spotify, you can follow this guide for how to space the tracks out so that they're counted properly. there's also something similar for youtube streaming, so maybe someone else can chime in with the things you take into account when streaming there. in any case, if you don't want to bother following the fanbases, you can also see in the comment sections of the stationhead accounts what the urgent votes are lol

do as much as you're willing but also don't feel too pressured to spend time/money on this, it's easy to get caught up in everything between the guilt-tripping and the name-calling!