Not sure about clubs in your area but without a doubt the best advice would be to get a girlfriend your age and wieght interested with you, find a local mma gym and just get stuck in. The only difficulty that you may face is getting someone your weight and skill level to drill with.
All mma clubs should be very interested to train someone interested and dedicated at your age. A good club (maybe one with a bjj school attached) is something you will have to research. Someone on here should be able to advise