I got all my long term commissions from here.
Then the typical Facebook, Instagram and Twitter.
Other places are Discord Servers, Deviantart's forum, TikTok, Tumblr, Reddit, BlueSky, YCH commishies (but that one is focused on adoptables and has very strict rules), then Vgen and KoFi but those require already existing popularity and active fanbase.
Calls and using a mic is not a requirement on discord, most people just type on the channels aka categories/topics. Is technically like a Forum