my advice as a fellow newby that just ran the gaunlet this last 4 months on a crash course in muzzle loading, would be take it into a muzzle loader shop first thing... if that isn't possible... buy a bore light, a good cleaning kit to include a wire brush, and nipple wrench,and roll up your sleaves...
you got your work cut out for you there.....Best thing you could do with it is fill up the bath tub with warm water and soak it for twenty minutes. if for some reason there's a load in that thing. that will kill it.

if you like tinkering and shooting a lot, and don't mind getting that black nasty powder all over you, it will probably be a lot of fun...it took me 6 weeks of tinkering and trying different amo and loads to get a consistant 2 inch group at a hundred yards with my TC Hawken. they have a 1:48 twist and shoot conical bullets fairly well with the right load. i'm told they shoot round ball pretty good too, but i couldn't get it going on myself.....lord knows you'll get a ton of advice on that...

my 50 cal Hawkensliked 70 grains of pyrodex P (Not RS) and i was using a 410 grain conical made by Hornady. "Great Plains" bullets i think there were called....from one partially seasoned rookie to another....Let the force be with you.... and remember to take your ram rod out before touching her off...LOL!