I can understand your situation. You might look into a GED though. They''ll let you work at your own pace, treat you as an adult, it''s easier, and takes less time.
With a GED you could go to trade school for diesel repair or refridgeration. Both trades would be in demand while out cruising.
I hated high school, went to 14, (5 in my senior year) but I graduated. Now I''ve got 3 degrees. Go figure!