I started reloading in 1975 with a single stage. I knew nothing about turret presses or progressives. My hands-on mentoring period consisted of 6 rounds (3 with me watching and him expaining and 3 with me doing and him observing, answering questions and supervising.)
I am happy to have started with that single stage, which I still have but it sees little use these days.
My next two presses were a pair of Lee Pro-1000s. They did alright, but I never got used to monitoring multiple simultaneous operations. Made me nervous. Caliber swaps were problematic (hence, two presses, one for large primer cases and one for small).
I never got very fast (partly because I did not have a case collator to keep the case feed tubes filled) and because I was always stopping to check powder drops and primer feeding.
Primers are gravity fed and if you have less than 4 or 5 primers in the feed trough may find problems. Dropping spent primers into the cavity where they are supposed to go was a hit-and-miss proposition.
I traded them off as soon as I could after I got an upgrade.
I upgraded to a Lee Classic Turret. I can load as fast on the Turret as I did on the Pro-1000s with a LOT more confidence.
In truth, the guy I traded my Pro-1000s to was extremely happy, as he like them, as many do. But I don't.
The primer feed on the Classic Turret is much more positive and the spent primers go where they are supposed to. Caliber swaps are a 10-second proposition and if you want to load in batch mode or continuous mode, all you do is remove or insert the auto-indexing rod. If you can be happy with 125 to 200 rounds per hour it is the way to go, in my opinion.
I have never used a loadmaster.
Using a turret like a single-stage in batch mode is an excellent way to learn and you can start using the auto-indexing to load in continuous mode if you want to raise your production rate. If you still want more rounds per hour, then you can consider getting a progressive. By that time, however, you will be in a much better position, with some experience behind you, to pick a progressive that will suit you.
Good Luck
Lost Sheep