As mentioned, this is not a speed game. It is relaxing, as long as we keep it relaxed. We get in a hurry, we goof. We break things. We leave steps out of the program. Then we get to the range, or the hunting field, and things don't go well. Keep it safe.
I once hurriedly loaded a box of 357mag's to help a buddy learn to shoot his Blackhawk. A percentage of the loaded rounds had no powder. Some had the spent primer still in them. Needless to say, I felt quite foolish and ashamed that I hadn't taken more pains with my work, as I had been doing it at that time for better than 20 years! We are never to old to learn from a mistake and we all make them at one time or another. You say this can't happen, but I'll tell you it will, when you least expect it.
Take your time and enjoy!
I used several balance beam scales for years. I hated the time it took. I got a good powder thrower for Christmas 'way back when' and it did speed things up. Including giving me a new learning curve to master. Like which powders to 'not' use with the powder thrower, and how to set up a rhythm so that the charges were the most uniform. None of this is rocket science, but there are things here to master as you go along. Don't get in too much of a rush or you will wear yourself out and loose the fun. It is fun.
Not enough lube will stick a case in your sizing die. Too much will result in 'dents' generally in the shoulder area. These dents will iron out when the shell is fired. Never felt they were life threatening, but they aren't pretty and they will create a weak spot in the case. Remember, all the case does is keep the primer, powder, and bullet all in the same proximity to each other for the purpose of detonation. In the beginning, after the muzzleloaders, the original 'cases' were paper. Your chamber has the strength that keeps the pieces from flying apart, not the case.
There is much to learn, and it won't come overnight. It is a great education. Welcome to the Fraternity!
Regards,
Sweetwater