Shannon, I found your post very touching. And you're proof in the flesh that the human spirit keeps pushing forward...even when it runs into obstacles.

Only other suggestion I can think of is I'm guessing you don't have a trainer at home so what about do you have a gym membership where would would have access to exercise bikes, or better yet spin bikes, just so you can get the feel of sitting on a bike and peddling.

It may seem silly, but I'm thinking that once the feel of peddling is familiar then you can concentrate on developing your balance.

Good luck! You'll be zipping around in no time. And don't forget the helmet...all the time!