Good luck.
Even with the much easier Sig P6 and (3rd. Gen) S&W 6904, I twice watched specific, well-illuminated videos (must also be Close-up depictions) before I considered disassembling the frames.
And did this to simply to change trigger groups and the pin retainer plates in my multiple AKMs.
Before I bought my first CZ-82 years ago, not much reading made it clear that some Czech handguns have about Twice as many components as a much simpler Makarov.
https://www.youtube.com/watch?v=Yv31Mr1XLsEIs the sear spring the only true difficult part ? Maybe this can help somebody?

Note: the only handgun frames I've totally dis/reassembled are the Sig P6/225 and a 3rd. Gen. S&W 6904.
This guy Emphasizes that if you insert a "V ish" - shaped spring the Wrong Way, one of the legs, due to a compressed tiny coil, is now over 1mm shorter than it should be.

If so, first go buy a new spring............at 5:40 he puts- - what Looks like the same " sort of V " spring -- on the left side of the receiver, but it's Not a very clear video for that. This step must be a real bitch.
At 6:32 he tried to get the larger piece on Top of the spring, while it blocks the view of the spring.
--------At 7:22, he has his punch already inserted into this larger component, as he then lowers it onto the area which has that tiny spring ("...and make sure that the autosear is all the way down..."), to allow the correct spring leg to extend into the proper area. He explains/shows how to do it.
https://www.youtube.com/watch?v=uki0Ta75oQwCan this video help anybody?

The tinier parts are often easier to See, better lighting, in this reassembly---at 33:56

, that weird V spring is inserted by itself, compared to how the previous video depicts it.
https://www.youtube.com/watch?v=46HIlWXXruU