system
A chat on subreddit /r/me_irl
human
Where's a good starting point to do this? I want to get on this but I'm very social media deaf
gpt
for furry art, DeviantArt is probably your best bet. FurAffinity as well. Instagram works, but probably wouldn’t get you the best results, and you wouldn’t be able to post NSFW art (though you could clarify NSFW art is something you do in commissions). as for fetish art, i would recommend posting your art onto respective subreddits (cumflation, futanari, MLP, and furry porn are popular) and see if anyone asks for commissions. i believe DA also allows fetish work, but that may have changed. you could also post watermarked/censored art and advertise uncensored on a patreon (ETA: someone has clarified that patreon has changed their adult content standards and “subscribe star adult” is now the standard) account. twitter is also an option for both of these, but unlikely to be the best 

unfortunately it’s a pretty hard field to break out in, and you’ll have to gain followers before you’re looking at a lot of money. but i know some artists of this type can make up to six figures. again, you’re unlikely to see these results, but it only takes one good commissioner to fall in love with your art style to make some pretty decent money.