I'm new to biking. What complete bike or frame would be best for me? I'm 5 '3 and a half, and 115 pounds. I'd like a light frame. I don't have alot of money. I'm just starting out and i don't really know where to begin. i know a 20" frame is too big for me. Is there some kinda chart that can help you size up the right bike for you? What do you think of WTP bikes. I heard they're pretty good.