Look, it's all here in this discussion board, and Jim has posted a basic summary
, but to get an idea of just how much you need to do, how long it will take (weeks or months of daily work, but at 13 you have
the time to do this with no problems), you really
need to do a lot
of reading back through different discussions here - pretty much all of them and maybe a hundred or so back in total.
But don't think of this as difficult - I would be very surprised if you did not learn a few other
things that you won't learn in classes at school!