RE: Thinking about making the jump ...
I have a book called Muzzleloading ... to begin with by Don Davis. It was my Black Powder go to book for many years. It does not deal with inline rifles. Probably because it was written before they were around. But he discusses traditional rifles and anything that might go wrong with them and how to fix it. I have NEVER saw the book offered for sale anywhere. It was a "gift" for joining the NMLRA years ago.
Other good sources are some of the black powder magazines, but I find a lot of them going to only inline discussions. And I have not renewed my subscription to them for years now. I am sure there are books out there. It is just a matter of finding them.
Anything you might want to know, just ask. The members of the forum are more then glad to answer. Believe me, the questions will start to form as you hit the range and shoot.