When I was in high school, long before the internet and wealth of digital information available, I had a fascination with guns, handguns were my undoing...I could take them apart very well it was the re- assembly that always got me.
Lucky for me we had a gunshop, the owner would see me walk in with a shoe box and knew I had taken something apart and now it wouldn't work.
He would show me how to put it together so I had no leftover parts and it worked correctly again....He smiled but never laughed at me, never charged me a dime for his time, I wish more gun shops like that were still around....nothing but big box retailers , those salespersons don't know your name and don't really care to help you with a problem.
Probably everybody who has taken apart a gun with more than two moving parts has had trouble getting them back together....
J.B. Wood has written a series of books on this subject, It's Gun Digest Book of Firearms Assembly/Disassembly part 1 Automatic Pistols has your's on page 314, complete with text and photo's. I'm going to use this book it to install a Wolff Service Spring Kit, recoil springs and three others , in a Walther P-38.
Neat book to have around....Gary