So I suggest you start with the basic skills, and practice kicking the ball and footwork of all parts first. The most important thing to play forward is to shoot accurately, then get familiar with the ball path, and then practice the basic passing actions of dialing, pulling and deducting.
More importantly, awareness and running. So use your head to find a good position and opportunity. Don't always want to rely on your own speed. This road is too narrow.
There's no need to lose confidence. Of course, universities are also hidden dragons and crouching tigers. Primary schools can't be the best, but universities are still the best. There are very few such people. So you can make progress by playing more and learning from others.