What I found confusing about Clymer's was some of their nomenclature. For example, how would anyone lacking experience be able to figure out if the clutch is ""type III"?...or if the photo/drawing was different/correct for their application?
It is worth mentioning that, anyone with some basic mechanical skills can navigate an engine build/rebuild...it will just be slower. As with any machinery, Honda engines have their little quirks and specific procedures. With experience, it gets a lot easier. Without experience, it can still be done, with great results...by tackling one part/assembly/issue at a time. I'd be surprised if you don't find anything that's at least a little perplexing, temporarily. That's where test-fitting, dry assembly and asking questions become necessary...and that's where the extra time will be invested. Actual hands-on time, plan on an extra 4-8 hours, total, with lots time waiting for questions to be answered and parts to arrive, in-between workbench sessions. It's really not daunting, as long as one is not trying to rush things.
In my experience, the overwhelming bulk of time & labor is spent cleaning & refinishing. With the required tools and experience, an engine can be torn down in under an hour. For me, assembly time varies greatly. With used parts, it's one or two pieces at time...a final shot of brakleen, a blast of compressed air, re-oiling, then into place. I always "dry fit" the lower end assembly, then verify that the transmission shifts properly and that neither it, nor the crank bind or have excessive endplay. From that point on, anything that might need to be R&Rd is straightforward enough. What sucks out loud is having to go back into the lower end after the rest of the engine...especially the top end...has been installed.
Once you dig into this project and have everything clean, ready-to-assemble, it'll make sense. Aside from the tranny/clutch assembly, these engines really aren't a lot more complicated than an OHV lawnmower engine.