It's not hard to start a nitro engine. BUT if you have no one to help you it will be difficult. But you can overcome those difficltes at the forum by gettuing advice. 1st of course the engine must be on a rich setting. There is plenty of information available explaining how to break in an engine so I won't go into it. See the link.

http://www.nitroreview.com/hintstips/enginebreakin.cfm

BUT I can tell you when you try to start the engine for the first time the piston and sleeve are tight and will lock together somewhat and you won't be able to bump it with the starter or if you have a pull start it won't pull. Then you jusy have to turn the flywheel over by hand until its free. Its stuck near TDC where the sleeve is just a bit smaller in diameter. By hand I mean you'll probably need a pliers to grab the knurl of the flywheel. I don't know what car you have but I have a Losi XXX-NT that I just built and broke in. The first time it got suck I unbolted the engine to free get a grip on the flywheel. What a pain to do that. You see, my old car from the '80's was a Serpent Excel 1/8 road car. I used to be able to open a channel lock pliers and manage to grip the flywheel without removing the engine. So I did it on the Losi. Well after I put it all back and tried to start it locked again. OK, no more removing. I was able to use my needle nose pliers and get enough grip on the flywheel to turn it. So I told you this story so you won't have to remove your engine when it get stuck like that.

Anway after you do get running, run the first tankful through it. After that your engine won't get stuck like that any more. That pretty much happens on the first time start ups.