It doesn't matter what age you are. You can look sexy and feel great, and that doesn't have to be a gift only for the young. It can be a gift for any age, even the old, whatever that is nowadays.
In fact that is the struggle that most Americans - As rich as this country is, most Americans are very limited in their interaction with the world, unless the world comes to us in a very shocking way.
A guy's biggest style mistake is definitely trying to look too cool. As long as you've got a good pair of jeans, a good pair of boots and a few good shirts, you're fine.