I have faith you can do it. You invested in the kit, make that a great investment, and have fun with it. As a friend put it when I built my first rifle, "Take your time, and remove only what wood isn't in a gun". The BIG thing I learned most is, if you feel rushed or in a hurry. Stop and go do something else, before you make a mistake. But then you also learn how to fix mistakes. (Like the time I drilled the hole three times for a patch box release.)
If I can build one from a block of wood, anyone can. My rifles just aren't as pretty as others, but I am still working on that. Just take your time and think two or three steps ahead, before cutting or drilling, and measure everything.
Good luck. Leon