Dre: The very first thing that you need to do is buy a good shotshell reloading manual. (I'm a little surprised that it took seventeen posts before someone recommended a manual). Every single one of your questions will be answered in that book (the Lyman Shotshell Reloading Handbook is a good one).
You can find load data online for free but the other questions need to be answered in a more organized way than the normal "free-for-all" approach that happens when you ask those kinds of questions on any forum. The answers that you get, as above, will be knowledgeable (most of them - can you tell the difference yet?) but each will be a bit different than the other. That'll be better for you when you know more.
With all that you are talking about purchasing, the cost of a manual is small change.
"Only hunting and mountain climbing are sports. The rest are just games." - R.Ruark
NRA Life Member