Re: What to start with?
A couple of things:
Before you buy anything buy a couple of reloading manuals. I like the Hornady manual as it explain how ammo works which helps to understand the process of reloading. Any of the others is a good choice, like the Hodgdon, or Speer, or Sierra. Pick the other manual based on the bullet you will use. Both Speer and Hornady make bullets expressly for the 7.62 x 39 SKS cartridge. I use Hodgdon powders so I have that manual as well (actually I have about a dozen manuals that I refer to, time to time).
READ the reloading "how-to" section multiple times until you understand the process thoroughly. Then decide what press and other equipment to buy. If you buy the equipment first you may make a mistake and pick the wrong press and regret it later.
Single stage presses are cheap. Lee is cheap. Turret presses like the Lyman are at least three times faster to use than a single stage press and make ammo that is just as good. Presses should be forever and be reliable. Presses from manufacturers other than Lee will last a lifetime. Lee, who knows (???). They won't in my experience but others differ on this.
But get educated FIRST!