BP revolvers are more simple in operation than any other modern handgun, aside from loading.
Loading isn't difficult though, powder, wad, ball: seat with loading lever. when all chambers are loaded, you can then put percussion caps on the nipples.
Cleaning can be very easy, if you're not so much into the history of BP firearms, I'd suggest a Ruger Old Army .44 in stainless. It's one of the most functional and accurate BP guns ever made and being stainless, cleaning it is very easy, just wash it in the sink, dry it well and oil up the action.
You can use substitutes to keep things even cleaner, I'd recommend Hodgdon 777.
I'd love to see more and more people in Mass get BP guns just to make those nut job liberals flip out and have a stroke. Mass has such high crime even with all it's regulations. The laws don't work, they just disarm good people! I'm betting that as the economy slowly fails in the next ....2 years? ....That people will be more and more desperate and crime and violence will be a huge problem. Gun sales, NRA memberships and pro 2nd amendment activists will grow and it'll start to be evident even to the numb liberals that good people should be able to defend themselves. The founding fathers would be ashamed of what Mass has become and I was apauled when Hillary and McCain won here in NH!! Evidently Live Free or Die doesn't mean anything.
Back to BP revolvers.... Check out the ROA, read up on the basics, gun safety, get to a range or find someone that shoots BP who can help you out too. I'd trust my BP guns any day for self defense, they works then, they work now, plus, all that noise fire and smoke will certainly reduce crime and put fear into these criminals.