Casting bullet can be as simple or as complicated as you want. I began in 1973 with a Lyman 45 Reloading Manual https://www.amazon.com/Reloading-Handbook-Pistol-Muzzle-Loading/dp/0912412003

I had no one to help but the simple instructions of the manual were enough to take care of me for many years. It is not voodoo or magic. Just keep it simple & basic. You don't need to know everything to start. A little common sense will go a long way.