im a 1 year G26 owner. You just need to practice more with a firmer grip and the smooth trigger pull. loosening a grip on a pistol can quickly turn into a bad habit.
You are new to the gun, and probably do not know exactly how for back the trigger must be pulled for it to go boom (hints the anticipating). The glock trigger is like a 2 stage trigger pull. After some practice, you will begin to know exactly when it will "click". dry firing will also help you out by helping you get used to the trigger pull.