It takes a lot of practice and patience. Even for experienced programmers it can be a slow process and full of missteps. One of the main skills is to be patient and methodical enough to figure out why something doesn’t work. Don’t be discouraged or impatient, and don’t be tempted to get AI to do it for you or to find your mistakes. You can use AI later but it isn’t a good idea when you’re trying to learn the skills. Try to do it yourself and, when it doesn’t work first time, take time to figure out why. Then do this lots more times.