Welcome to beginning the fascinating hobby of reloading.
Yep, things get confusing when you ask questions and get responses from guys that have been reloading anywhere from two months to 50 years.
I'll try to give my two-cents worth, but remember, I've been stuffing bullets for well over 40 years...
The Lee had press is a great tool. I use it at the range when I am developing loads.
The absolute first thing you need is a reloading manual from one of the major bullet manufactures (Speer, Hornady, Sierra, etc.) or from Lyman. Read the introduction sections several times. Ask questions here if you are confused about terminology or technique.
The Lee die set is a very good buy and a great start for beginners. It does come with a shell holder (and I think it is the only one that does). There are a jillion dies out there, many of which are very special purpose -- you don't need them now. If deer hunting is your major objective, the Lee dies will serve you just fine.
You don't need a powder measure right now. Get a good set of balance beam scales (the 1050 is fine, but may be overkill for your purposes -- a less expensive scale will have the same accuracy as long as it is from a reloading equipment manufacturer (Lee, Lyman, Ohaus, RCBS, Redding, etc.).
Calipers are needed if you reload your cases many times, as is a case trimmer. Just starting out and using your once fired cases, you can do without it for now. Put it on your list to buy before you try to reload cases for the second time.
All the jacketed bullets from almost anyone today are of excellent quality. Buy a box of 150 grain soft points (not full metal jacket) from Speer, Hornady, Sierra, etc. and your deer is toast if you can do your part.
Start with the minimum loads per the reloading manuals, and work up the powder charge one-half grain at a time until you are two grains below then maximum load and the stop. Any of those will be a great deer killer; just pick the one with the best groups. Two grains below the max will keep you safe and 99% of the most accurate loads are below the maximum listed in the books.
There is no "magic" load that is accurate in all rifles. Pick a powder (4895 is not a bad start) and load some up and test them at the range for accuracy.
There are many, many technical points and things you will learn as you progress, but do not let them scare you now. Read the books, keep to the bottom 2/3 of the powder charges in your manuals, and ask questions. That's all it takes to get started.
Gain experience, stay safe, and be sure to ask questions here.