Self Practice: Usually 45 mins if only practicing serve. I have been practicing 2nd serves only and I will hit a few 1st serves in the end. If the practice session is 1+ hour I will practice serves for 30 mins and either drop feed (stand in alley and hit the ball straight within the alley) or use a ball machine to hit cross court from the baseline for rest of the time.
Practice with friends (doubles only): play for 2 hours. 30-45 mins free hitting from baseline and then some volley. Then play 1-2 sets for the rest of the time with rotating partners. The forehand video I sent was from practice with friends. We usually record the practice.
Is there a structure that you can propose for my self practice of 1 hour that will help me improve my doubles game?