It takes time

Picking up a new skill takes time. It's easy to forget, and fall into the trap of getting frustrated that progress isn't as fast as you want. 

I just played my second game of tennis. It didn't go well. But it's important to focus on the things that did go well, the few serves that were in, the few returns that were delivered with good technique, rather than the many shots into the net or too long. 

Over time the ability to naturally do these things well grows. The process includes a stage of being terrible. Thats how this goes.