Congratulations, first of all, for taking charge of your health in the most basic way we can - by what we eat. It sounds like you have made some amazing progress!
As far as advising you, however, I'm going to need to direct you to the forum guidelines:
I would like to know, how much is my heart condition affecting me? Can sedentary 300Lbs people jog? How far behind the curve am I due to my heart condition? How much is just from eating SAD and being inactive?
1) Personal health & medical questions can not be answered in a public forum like this. If asked, I will not be able to respond to them. Questions about workouts, training, physical therapies, clarification on exercise " mythinformation", (new word!), etc., are welcome.
The guidelines in more depth can be found here:viewtopic.php?f=33&t=26273
There is too much particular to your situation for me to be able to give you the answers to these questions. Hopefully your health care provider with whom you are working can assist you in appropriate physical training as your health improves.
Thanks for coming by and all the best of continued success. Keep us posted!