It's also a good idea to have an instructor look over and test fly the plane for you. Even a little bit out of trim can make an otherwise easy to fly plane a real handful. Even ARFs can be out of trim or need fixes before being safe to fly.

Also, some guys find running the engine to be easy and no problem, but it's not uncommon for it to take a little time to learn how to tune the engine correctly. An instructor can really help here too.

I'm not saying you can't do it, just that you'd be better off wil some help.