My suggestion would be to take it one day at a time.
Start with some basic floor excercises and do just about 5 of each excercise at a time an increase slowly.
Leslie has some good one,two and three and so on tapes that are good and not very strengious and can do them at your pace.
I hope that this helps and getting started is the hardest part,but once you do you will be surprised at how much better you feel and want to continue.
Now my real problem is not eating sweets and needing to loose weight.
I excercise daily and strength train,but can't get it together with my eating right.
Have a great day and start today!!