I am 18 years old and I am looking at getting myself a bike that I can handle as I have only ever ridden a quad bike on some very, very easy trails. I will definitely not be using the bike for racing. I am only 48kg and I am about 5'2". Due to my ridiculously small physique, I don't think that I could handle a full sized bike. However, I don't want a bike that I am going to out ride in a few months. I am a total beginner and I don't think I will ever be an aggressive rider. I don't know too much about bikes yet (my boyfriend is the expert) so any advice will be helpful.