Let me see if I'm remembering this correctly...

You are the 16 year old who has been driving for about half a year and whose parents will buy him any car he wants? And recently posted that you want to get the ESX Sti?

If your parents can afford to let you buy anything, how about they buy you a crappy 5 speed to learn on for a few months, then you can trade that in on the nice car that you will end up getting.

I learned on a WRX. It was tough at times. For someone who really isn't very experienced driving anything to try to learn a stick on a moddified STi is just asking to get involved in some bad situations. Rev that thing too high because you keep stalling out, and you may get going (in boost) right into someone's bumper.