Well, I'm guessing that at 5'3", you aren't very heavy either. So, if this is your first bike, I'd consider looking at the new Ninja 250R. It is a great bike for the price and a great learning motorcycle. Besides, it looks awesome for a small bike. Most people can't tell that it's only a 250cc motorcycle. Don't be discouraged because I'm recommending a 250 motorcycle because, I'm 6' tall and nearly 200 pounds and it can cart my ass around without any problem. However, there are also 2 500cc bikes that make great starter bikes. The Suzuki gs500f and the Ninja 500R. I personally have the ninja and the suzuki was my second choice. If you don't want a sport bike, kawasaki also make a nice 250 and 500 cruiser that I'd take a look at. You won't be disappointed with either.