Their product is never flat. Always warped.
Seriously, Gizmo, answer us this: Why don't you just go apply for a construction job this week? They'll train you in what you need to know if you just show up and work hard and they think you're worth the investment. Even if it's just until your class starts, it will get you some real-world experience. You'll get the muscles you need as fast as possible by actually doing the work.