Not only yoga, but Bikram. 90 minutes in a hot room, 2 x 26 poses. I would recommend it to anyone who is not faint of heart. Although Bikram Choudhury is a creep show of an individual, these classes are worth experiencing. I did it for a dozen classes, what a trip.
To your question: no. I think you'd get more out of yoga after resolving weight issues, I think yoga and excess weight (big belly) and injuries it's a really tough combination. Too much compression and balancing issues. No one in any of my classes was visibly heavy or injured.
Walk it off, or do T25 on the modified level. Save yoga for later.