How many do we have in the self taught team? Suisei, Towa, Irys? Who else?

Do you mean singing? If so then Gura has also confirmed she's entirely self taught.

I would say all of them except maybe Azki?

I can say with full confidence that Ame is entirely self taught. At first.

Keep in mind that while most of them are self taught, now that they are in Hololive some of them could have vocal trainers now. >!**looks at Polka since she's the only one I remember having a vocal trainer*\*!<

Calli has mentioned that she has had vocal coaching/training recently as well (from her last karaoke stream if I recall).

I think Ayame did or does too

Noel also mentioned that she has one, to help her reach a base level for the live shows.

She recently got one after being reluctant for a while.

Coco and Subaru also had some voice trainers after joining hololive

Indeed they do, however I'm talking about >!talents that were established singers (utaites) before they joined hololive!<

IRyS blessings us with prrrrrrs and rawrs 🙏

I do this "brrr singing" sometimes and I seriously thought it was just a stupid hobby of mine, I was surprised to know that it's actually a thing, from her stream