I have 5 manuals Buy the Speer#15. Best print quality, best technical and historical notes and more realistic load data because they don’t own cartridges. Every beginner needs to read the first hundred pages of a reloading manual. I shoot a 43 year old .308 on an 18x24 plate freehand at 500M with $40 Speer HotCor bullets loaded according to the Speer manual. No internet connection or chronograph required.
Realoader 15, 748, Varget, IMR 4064, H and IMR 4895, IMR-8208, H4350 with 200’s are just a few that work.
Welcome to the rabbit hole.