Don't worry too much about "knowing how" to build a 2stroke engine. I didn't know how until I did it. I'm not afraid to take apart any engine. You have to be very methodical and organized. When you take something apart it's good practice to label things and to lay them out on your bench in the order they came out. Take lots of pictures and by all means ask this group anything! No matter how stupid you might think the question is, we have all probably asked it when we were learning.
Good luck with the build and most of all have fun!
Loren