Yup, you can start out with an iron pot and a dipper, but that grows really old fast. To make matters worse, I used to have a flat pan with lube it in, and I cut and then pounded the slug through a sizer die by hand! Those days are over.
I now use a 20 pound Lyman bottom spout casting pot. I have a lube/sizer die press that takes all of my favorite calibres. I use a Dillon Square deal for my most common practice round, the .45 ACP. I do have the parts for a .40 SW and the 10mm, but that necessitates removing the shell plate. Easy, true enough, but it's almost as easy to screw the dies into my Lyman turret press. After +20 years of doing this, die set-up is a snap. BTW, I now have an electronic powder measure. How did I load for so many years without one?!! That makes precise powder measuring a breeze!