I am a giant blob of wobbly bits, have self image issues and can't touch my toes (yet). But I've been going to a lovely yoga class.
Everyone else is slim but they are all busy doing their own thing that they don't seem to judge. Maybe they are, I don't know, but the experience I have is worth a few people thinking "wow she's fat". I'm hooked
I've also done some youtube videos, I don't know who the teachers were but some of them were good, some were just a bit too... clinical. Depends what kind of yoga work out you want really!