Hmmm.
Taking apart a folding knife is extremely simple. It can be more complex if it involved springs or open bearings, but really it's one of those things where if you are just slighty enclined to taking things apart and fixing them, taking a knife apart is fun.
If you call an electrician because you have a light that's not working, and you won't even touch the bulb, or go near the panel out of fear, or if the thought of changing the air filter in your car makes you hide in the closet, maybe you shouldn't take a knife apart...
There are many video's on YT on how to do it........