Way to go Tucker,Sounds like you are well on your way to being a pilot.I to started from RC planes and still enjoy flying them.When it comes time for your engine choice you will probably be overwhelmed by the many different choices and options.If money is not an issue then the 912 Rotax would be an excellent choice for you.But if you are trying to keep everything affordable then you might consider a 582 Rotax.There are tons of Kitfox 4,s out there with 582,s on them.There are also guys that started with the 582 and upgraded later on to a 912.You will be able to do lots of building before having to make a decision on the engine.If you decide that you are going with a 582 then let me know as I have a new style mount for a Kitfox 4 that I would donate to your cause. You would only have to pay the freight.Good job young man.
Randy