How to feel like an idiot in a Yoga class w-o really trying

So I've complained about not being busy enough, or having enough friends and about the quit weight gain. Figured I could keep complaining or I could take positive action.I googled yoga in NYC and found a place to try. I'd taken all of 3 classes prior in my lifetime. I recalled once where they heated the room a bit, which helped me feel more flexible. I signed up for today. Brought the right clothes, had a bottle of water, went into the room. Found out it was heated to 104 degrees!!! Oh boy. I was the fattest girl in the class. Oh boy. We started doing some moves and my face proceeded to turn beet red. I mean, you think I had sun poisoning red. Oh heck,Herbal cigarettes, gimme a white beard & I looked like Santa Claus red. We did some balance positions, stand on 1 foot - NOT!!! Bend all the way back and touch your ankles - NOT! Lay on your stomach grab your feet and bring them as close as possible to your head - NOT! Lay flat on your back and rest - I liked that one.The instructor walked around the room helping us. After 10 mins he basically kept away from me (possibly as I might topple over and injure him),stop smoking now, except for near the end of the class when he kept asking me - Are you okay??I showered for 10 mins after and still sweated for 10 mins after that. The reddness went away about 30 mins after the class. I rushed to Starbucks. If anyone dares suggesting I give up coffee, I'll kill them. One good thing. Ate dinner, but couldn't finish. Newest project: google "Yoga for Overweight people who have no wind or dexterity" And how was YOUR day?