I learned on a progressive...
I went with a dillon 550, & for the first 50 rounds i used it as a single stage, measuring & weighing(2x) at each station. Then i proceeded to run it in the progressive mode albeit pretty slow. Now, i'm much more aware of what's going on. I've never pulled the handle on a lee, but it seems to have a love/ hate relationship. Enjoy reloading and be safe.....READ everything at least 2x, & measure, & if i forgot...read your load manual to a 'T'