How often do you have to take apart a gun for cleaning? Is jamming ever a concern with revolvers or shotguns?
For the purpose of ctb, you shouldn't need to worry about practical disassembly ("stripping") or cleaning. After all, you only need to make one shot, after which the gun's cleaning is someone else's problem.
That said, as a recreational shooter I do a very basic strip (no tools, just what is needed for cleaning) and cleaning after every time I go to the range. I also clean and oil each of my guns at least once per year even if they haven't been fired, just to check them for rust and dust --this was an Election Day tradition in my family. Anyway, I'm sure there are many, many YouTube videos that can introduce you to basic cleaning methods and supplies should you take up the passtime of shooting.
Jamming can sometimes be a concern, but with a gun fresh from the store and with a box of good ammunition the chance of a jam is very low. Revolvers, in particular, have exceptional reliability, which is why I have advocated for them in this thread. Likewise single-shot shotguns --all you'll need is one shot-- have very good reliability. Semiautomatics, pistol or long gun, have the highest chance of jamming.
If you choose to take up shooting recreationally, mechanical reliability soon becomes directly correlated to the care you give your gun. Keep it clean and feed it with good ammo (no reloads or cheap, off-brand junk) and it shouldn't ever jam.
All that said, sometimes you
can get a "lemon": my first pistol (a semiautomatic), a very expensive gun bought new from a very reputable manufacturer, turned out to be a jam-o-matic. I never made it through a full magazine without at least one jam, and I eventually traded it for the gun I have now (another semiauto), which in 18 years has yet to jam. I had bad luck. That happens. But I don't think you need to worry about it for purposes of ctb; almost any gun will fire the once.