Hindsight has told me that school is more about classes and grades. It''s also a time to begin to develop more sophisticated interpersonal and communication skills. It''s a time to mature as well.
This isn''t something that can be rushed, and it is something that will affect you, for better or worse, for the rest of your life.
Finish HS or the GED. How old will you be three years from now if you don''t (hint: same age as if you do, but without the diploma).