What do you plan on using this little revolver for?
I carry a 637 daily. On my hip. I have no interest in pocket carrying like a lot of guys do with J frames so I don't mind the hammer. In fact, I like it. I don't have to use it, but I still have the option to take more precise shot if the need ever arises.
Most of my practice is with this gun is of the point and shoot type though. It points very well for me. I can routinely put most shots near the center of a man sized target at 5 yards without the sights.
For carry I load it with 158 grain Buffalo Bore LSWCHP in standard pressure. It is similar to most +P "FBI loads" from other ammo manufacturers. I tried the +P version from Buffalo Bore too, but it is pretty stout. I decided not to beat up my gun, and myself, with it. The velocity of their standard stuff is good enough in my book.
Cleaning is no big deal really. You'll get used to it quick. Don't worry too much about the cylinder face. Scrubbing it clean after every outing will become a chore. Most of the time no disassembly is required when cleaning, just open the crane and begin. Should you ever decide to take the side plate off though, be gentle. It aint rocket science, but you may want to study up on it. YouTube can offer some guidance.