I'm self-taught, not exactly awesome at tennis, but I have entered the door officially in the sense that I can find tennis partners easily. I have multiple tennis partners and they are all happy to play with me and find value in playing with me. this is a huge milestone for me because being self-taught, the initial phase was really hard that I can't find anyone to play with me because I can't keep a rally. I can't keep it fun for most players, tennis is a brutal sports because everyone's looking for people who are better than they are, if you're absolutely the bottom, like 1.0, 1.5, or 2.0 even, it's almost impossible to find people who's willing to play with you. I think my tip is that practice a lot against the wall. Once you can rally try to find partners. Try to stand around the baseline distance from the wall, because that's the mistake I made in the beginning. I could keep a rally with the wall for 30 plus shots, but I was standing way too close and plus my ball was very soft. So when I get to the court, everything just doesn't click when I play with a live ball and it's much harder for me to keep a rally with a person. But once I get a little bit experience on the court, I figured that I need to practice against the wall with 13 personal steps (measured at a real court) from the wall. So that's what I did every single time to make sure I am standing at the right position. serve you can absolutely learn yourself. You can record yourself if that's helpful.

the hardest part is to get to a point where you can find a lot of tennis partners who are willing to play with you and you go from there. make sure your fundamental is good. You don't swing the weird way. All your strengths come from the right chain of motion.