RE: Jitters!!!
Don't sweat it. I learned with out a buddy box years ago, and I splattered my plane so many times it wasn't even funny. We did the "pass the box", and so many times it was just to late. (I got some lousy advice, and my plane wasn't really a trainer).
Anyway, the advice above, sims, buddy boxes, and choosing a good instructor are all great things that make learning go a lot smoother. You'll get it down, it just takes practice. Some guys more than others.