Help me choose a minie ball mold

I've dipped my toe into the muzzleloading pool, and have an Armi Sport repro 1863 Springfield rifle on the way.
.58 caliber. I've plenty of pure lead, and tin if I need it...but no molds.
I'd like to shoot a minie ball, as I have read that this rifle was designed for these. Is there one that I could start out with, or should I just wait a bit until I have the rifle in hand to check bore size? Does one size these giant things like a normal boolit, or shoot them as cast?
I have read about a crisco/beeswax mix for lube, so I can whip up a batch of that easily.
Also, I would love to begin with a Lee mold, as I don't want to spend a ton of $$ on this to find out that I'll only shoot it once a year.
I plan to use real black powder, love that cloud of smoke!
Any other advice would be very welcomed as well.
Thanks for the help...