Wraith,
First, welcome to RCU! It's a great place with a lot of friendly people, and you'll find a lot of good advice here.
I'll also recommend an instructor, and am happy to see that you're heeding that advice. But I think you might be okay learning on the Midstar. You've given us more info since your first post, and the Sim time and "control reversal" you learned with RC cars will help.
Rather than spend the little money you have available to buy a trainer, find the instructor first, and try the Midstar on a buddy box. You should know pretty soon if it'll work or not.
Good luck, and have fun!

Dennis-