I would go to Midway and look at the Lee REAL bullet molds for 50 caliber, along with a ladle.If I am remebering right, they even make one that has 1 REAL bullet cavity and a .490 round bal cavity for black powder shooting. I am assuming the the production pot is not a bottom pour, as I have one. he aluminum molds heat up quick, and work good if you folow the directions that come with them.
For lube, I use wonder lube, which I apply with my fingers. Keep in mind that for black powder you want pretty soft lead, especially with a bullet. You may get by with wheel weights on a round ball.
Once you get going, it'll fall into place pretty quick. Good Luck and welcome to the club.