Since I use the Lee classic turret press kit that I included a link to, I will walk through the steps I take loading 44mag hopefully to help answer some questions. As stated earlier this is how I do it and there are multiple ways to get the same result.
I did alot of research on what to buy to get started myself. Im frugal and hate buying things twice and also didnt want to buy the cadillac when all I needed was a good chevy.
First thoroughly read the big book that comes in the kit I linked, It will explain the why and how of all further steps.
Starting with spent brass I run them through my inexpensive lyman tumbler using walnut media made for cleaning brass (I tried to save a buck with pet store walnut shells not worth it to me)
About 2 hrs later I have a couple hundred clean brass to start loading, as I take the brass out of the tumbler I inspect for damage and put them in a bin.
The instructions that come with the press to get it ready are pretty easy to understand, the Lee 4 die set I use have good instructions to get them on the 4 hole turret that comes in the press kit.
The press kit has a primer feed system that when you pull the press handle all the way down the ram pushes the brass into the decapping and sizing die (station 1) that action pushes the spent primer out into the hollow shaft of the ram into a tube at the bottom. Than you simply press the primer feed to load a new primer. When you move the press handle back up it will seat the primer and rotate the turret (station 2) to the powder drop and case mouth flare position. I use the included auto disk system but instead of the disks I use the micrometer accessory sold separately.
I get the powder measured and adjusted using a small Frankford Arsenal digital scale. I dont like the beam scale that came in the kit.
Once I get the proper grains dropping (refer to included book) and the case mouth slightly flared its on to the bullet seating die (station 3).
Bullet seating is a simple as pulling the handle on the press. You set a bullet on the case that has been primed and loaded with powder. Die has a threaded knob on top to adjust seating depth and OAL. I use a harbor frieght digital micrometer.
Last station is crimping.
So the Lee turret press is 4 pulls for a completed round without pulling the case out of the press. It can also be used as a single stage press by pulling out the index arm in 2 seconds in that case you do each step multiple times as a batch.
I reload most cartridges listed below and haven't used it as a single stage though.