There are some who'll disagree with me but I advocate starting on a single stage press.
If your on a tight budget, then Lee products are the way to go. You can get started reloading on a Lee single stage press, and a set of dies for well under $100.
You can buy a book for a specific calibre, cast bullets, primers and list here on the classified forum for the calibre of brass you need.
Should you decide that you want get a higher grade of equipment, the you can.
I strongly recommend RCBS.
Should you decide you want to continue reloading or diversify, then a hardback book like Speer, Hornady, lee or Sierra is called for. These books list most of the calibres in use today. IE: Hornady lists the 6.5 Grendel but the others do not. Before you spend the money on a book, check it out and make sure it is what your looking for
I am a fairly new reloader, started in 1978, and love it. My wife sez that the only reason I shoot is so I will have something to reload.
I think she is right.
Good luck