Does this rider and horse look good together?

Yea I think Paco would be the right size for you. He looks about your size. As for your weight don't worry about it hon. I only weigh about 10 pounds more than you and do fine on a little pony. Have fun with your new horse, and remember how lucky you are just to have a horse, I've been wanting one for the past 5 years, and I'm 15 now:)