dude let me tell you from newb to newb its fun. i haven't went to shoot my first loads yet(hopefully this saturday) but learning it, and then making it precise is about as much fun as working on a car(I love working on cars) buts its much more scientific. last night I went to my dad's to adjust the press(4 hole turret) in order to make the over all length of the casings to my satisfaction. after 10 non-powdered bullet makings, I reached what I decided my die would be adjusted to. Besides, its so much fun to hang out and do this stuff with others. great excuse to hang out, seriously. I check the bullets by putting them into my barrel and seeing if they are flush or not. All of them fed just fine and were under my max OAL, but the flush ones are the spec I want for my specific barrel/gun. its more precise that way.
I am not worried about blowing my hand off because I will be ensuring the auto-disk thingy will dispense the correct grains.
From my limited experience, reloading is about checking, re-checking, and doing it again for like 10 times before you get comfortable, but even then not really. its like gun safety. just check it to make sure.
When I say check, I check the over all length of the case, then the case+bullet after seating, then the powder charge(i have a scale as well, so i can check if the dispenser is being accurate or not)