Where is your sense of adventure??? :-D
I used these videos when I got started - there may be something with better production available now, though...
https://www.youtube.com/watch?v=9VhX...Q2FMDvFsgCtXkF
ETA: IIRC this video is pretty good too, if a bit long https://www.youtube.com/watch?v=WGMnbeCv4gA
There is also an official armorer's manual available: https://shop.cz-usa.com/ProductDetai...rmorers-Manual