i need all help i can get

At over 700 lbs i need all help i can get, like what are some exercise i can do in bed because I can barely walk

Any movement to start is better than none! Just lifting your leg as many times as you can off the bed. Bending and straight both your arms and legs, rolling (as far as you can) from side to side, siting/Raising up as far as you can. Anything you can do to move more than you normally do. But I. The beginning it will be about what you eat that is most important. Good luck!

Great advice!