It sounds like your engine is set way too rich and is flooding. OS always seems to set the low-speed mixture very rich from the factory and I've had several that would not run without being leaned out first. By the way putting an electric starter on a motor that is flooded is not at all good for the motor...

OS makes excellent motors but dialing one in is a little tricky if you haven't done it before. Find a nearby club and bring the plane out when folks are flying- I am sure that they will have the motor humming in just a few minutes. And you can make use of the opportunity to find out about getting an instructor!