Hitting partner this weekend Highland Park/ Hermon? south Pasadena

Hard hitting partner needed to work on my backhand/ forehand, serves, et. Im 6 ft 240 lbs . (lost 30 since Dec)  I will be 50 in Nov , and my goal is to get close to my  High school form by then.   I practiced today in the bright sun to 2 1/2 hours. Who can hang,?? Early am or Late afternoons before six pm!!