There's nothing to discover, and don't think that you will have stories to tell after you're done. Forget about indecision. Your time is too valuable to be wasted, especially when you are young.
Don't think that you will be able to work on your business in a gap year either since most people start businesses after experiencing genuine pain.
Instead, I would recommend an anit-gap year, i.e. getting things done faster or a gap year at the military.