Originally Posted by Bri w

+1.

Join a gym, and talk to the professionally trained instructors.

I dare say there are any number of us on here who've been, or are, pretty fit. And maybe some of us have been trained to a pretty high level, and competed at a high level BUT being trained and being trained to train are two vastly different things.

P.S. I'm a relatively old fat cripple but in a past life have trained, and competed, at a decent level but I wouldn't dream of giving any other advice other than get a professional for the advice you need.