Nancy:

Shop around a bit and find a bike that fits you, that suits the sort of riding that you want to do (are you just going to cruise around the neighborhood for short distances, do you want to do some of the longer road or touring rides, or do you want to take to the woods and shred on singletrack?)

Nearly all modern frame materials will support that kind of weight. Make sure you get a good sturdy set of wheels, and you should be set.

Ride as much as you want to, or as little as you wish. Ride as fast or as slow as you want to go. But ride!



Tom