Once you understand the basic process, the best way to get to know reloading is to do it. There's certain stuff that's not really going to "click" until you get started. Some of it seems complicated and isn't. Some seems like it's not, and is. Folks will swear that a certain thing works, or doesn't, and you'll have the exact opposite experience.
Lube? Yeah, there's spray lube. Generally only for rifle/bottleneck cases. Usually you put some cases in a plastic tub, spray some lube on, shake them around and then size. You have to clean the lube off somehow, regardless of the type you use.
If you're loading pistol cases, 95 times in 100, no lube needed. That's why they make "carbide" dies. Carbide dies for rifles still need lube though. Some folks lube EVERY case even with handguns in carbide dies. Some folks lube every 10th or 20th one just to make it easier. Most folks don't lube any case that goes in a carbide handgun die.