There are many other ways to lose weight than sports!
Try Aerobic dance, its called Zuma and its loads of fun.
Believe it or not, but yoga will help you. It will help you be more flexible and it will help your stamina.
Try working out. It doesn't have to be hardcore at first, start off slow. As you get stronger, you will be better.
Run or go for a walk. It helps your cardio and stamina.
Many other ways too. Try googling some ways!