Both easy and hard.
Start by getting a book or two or more on the process. I have found that a book printed by a tool maker will be favorable to that brand. So, get more than one book.
Read these books cover to cover, and parts several times.
I must assume that you have already looked at the stickie at the top of this Forum. After studying it, check this one also. This Forum that deals directly with your question.
Gather as much information about the products you favor but don't get stuck with the view that brand x is best and disregard all others. Remember, if a product doesn't perform, it will not be in the market very long. One brand/tool type will have advantages over another and that other will have other advantages the first doesn't.
So I have not answered your question and may well have irritated the Forum by referring you to another Forum. But I want to give you as much valuable information as I can.
Loading does many things. Better understanding of a weapon and it's capabilities, tailored loads for your weapon and needs, a great pass time when you just can't be out shooting, and could save some money.
Remember this truth: Always error on the side of safety.