Besides playing golf and softball, I spend 4 or 5 days a week at the MVP Health Club at Brownwood. You'll find as the older you get the more you'll need to use it, or you'll lose it. You could get a free 3 days pass and do anything that a regular member does, and if you like it, join for a month.
It sounds like you know you want to exercise, but don't know where. I see new people vastly out of shape come into the facility everyday and there's no better time to start than right now.