My one piece of advise to a new shooter: SLOW DOWN.
Slow, well-placed shots are your bread and butter. No matter how good you are, no matter how much you train, a major portion of your training time should be devoted to single, slow, well-placed shots.
If you can shoot slow and carefully, and if you are physically comfortable shooting slow and carefully, then speed will be there when you need it. You shoot slow and carefully to train your muscles to recognize and feel comfortable in the positions they need to be in for accurate shooting. But, you don't train your body to be accurate at high speeds by practicing at high speed. Your body learns accuracy at high speeds by practicing at low speed.
Number one thing to practice: Slow, carefully aimed, well-placed shots.