Hi, I have done yoga for years. Outside of my few days at a spa last year where they had yoga classes, I have always done it at home by myself. They make a lot of yoga tapes/dvds to choose from. You can find beginning ones all the way up to very strenuous power yoga ones.
Collage videos has a lot and they list if they are beginners, intermediate etc. A lot of tapes show various levels to follow, one doesn't have to be a size 6 pretzel to do them.
Also I get the Living Arts catalog at home, they have ones,
and I have also bought them at Borders book stores that have a lot of dvds/videos for sale.
I try and do some yoga at least couple times a week, I love the stretching, and the relaxation features of it.
try it, you may get addicted like I have! hugs, Josie