I would get someone experienced to look at your engine before you buy a new one. I am guessing that it can be started with a little know how.

Simple things like removing the cylinder head are not recommended for a beginner. It is obvious from reading this that you do not have much glow engine experience. Don't take this as a criticism. Everyone has to start somewhere.

Get someone who knows what they are doing and I am sure everything will become clear. There must be knowledgable person near you (you managed to get a starter pretty quick, ask the guys there to help).

It will probably save you a lot of money too.