Re: Which Kit for First Time Reloader?
To answer your latest question, a full length sizing die does just that, reforms the case to SAAMI spec's down the full length (except the last 1/4" or so, and for that you'll need a small base die, but let's not go there yet). The neck sizer does not engage anything below the neck, resizing it only to ensure proper neck tension on the bullet.
I would add my two cents on the kits: make a list of what you have to have, and several here had fairly complete lists, but be cautious about the digital scale/dispensers. Personally, I didn't like them and still do my rifles with a powder throw and trickle to desired load. I have a friend who shoots match quality groups who uses a shell casing ground to a very specific length for a particular powder and load with a soldered handle on the side. Same thing as Lee's dipper spoons, but he's too cheap to buy a set and won't use the ones I gave him.
BTW, I used an old RCBS RS single stage press for 30 years, still have and use it.
Use your BPS credits for bullets/primers/powders if/when they get some.
Good luck and welcome to the insanity.