Working out is great for everyone!! I workout 3 times week in addition to taking my medication regularly and it's definitely part of my lifestyle now.
Does your gym have classes???
I would suggest taking a class that meets regularly. Having an instructor to push you will make it worth your money. I know myself and if I didn't have a trainer or a class to go to, I would find every excuse in the world not to go. I've wasted so much money in the past on gym memberships that I never used - now all I do are classes.