Becoming a better scoring point guard?

Im 14 and play high school basketball. I play point guard an average about 10 ists a game an only about 2 turnovers a game. I am a 30-40% 3-point shooter but only shoot a 3 Mayr once a game or not at all. I would like to be a better scoring point guard and average around 12+ a game. Any tips, drills, advice would help.