RE: Engine suggestions
When I started...I knew nothing. (not so sure that I've improved much)...
A friend gave me a used Tower .46. The pros at the club, and I, screwed around with that engine trying to keep it going. After buying an electric starter; glow igniter; batteries and all sorts of crap..inlcuding a too big trainer plane that needed a .46 fuel engiine...I finally said, screw fuel-power and went back to electric.
A year later, I bought an OS .46 AX. Started the first time...ran great...even after I nose dived in a number of times. I cleaned the mud out...and she started right back up, every time. I've had other engines since...NONE worked so well as the OS out of the box. It STILL is my #1 confidence engine.
Make sure your first engine is a very easy to run; reliable one...or you can lose interest real fast. Rich