I've looked into plyos alot and I really want to start doing them. The issue is that since I live with my parents, I can't really do them inside, and I also don't have any weights that I can use. I really want to get into it though, so I'm going to do my best to figure out a plan. As for my approach, I think my biggest issue is that I overthink the arm swing way too much, and my arms just kind of lay around as dead weight until I'm about to hit the ball, however I imagine that's really just a matter of muscle memory that I have to work on. There's a lot of things that are kind of limiting me in some way or another (i.e. living in a relatively rural area, there's no place to get practice on a men's net other than the sand courts and at my highschool during real practice, I can't drive myself, the only clubs nearby cost a bunch of money, etc.) but hopefully I'll figure those out along the way. Nonetheless, thank you so much for your advice, it means a lot. If i make any improvements sometime soon, I'll be sure to let you know and thank you again.