A small library of reloading manuals, (three or more ) , is a must and even old time loaders and wildcatters like myself constantly pull them off the shelf as reference sources along with my trusty Powley handloaders slide rule. No need to buy every yearly edition as there are rarely serious info changes so wait and pick up the older ones like every five years or so. In addition to reloading manuals if you you think you may get the bug and spread out down the road keep your eyes open for Ken Waters' 'Pet Loads'. A two vol set covering everything from the earliest black to smokeless conversion cartridges to most of the rest with hand loading analysis and insightful tips on not only brass prep, seating, pressure reading, powders, primers, the whole enchilada. One of the best reference sources by a man who forgot more than this collective may ever know.
Back in the 80's I was approached by my favorite gun shop and two local clubs to help put together a reloading class. There were three of us and we ran three sessions on successive Saturdays. Each of us taught specific areas of the reloading spectrum and swapped around from time to time. After a couple of month the word got out and we had some sponsor help from gun shops, Thompson Contender, Accurate Arms etc. We limited the class to eight at first then with donated presses and tools it grew to sixteen. Everybody enjoyed the class but after six months we shut down due to health issues and one club with a fear of liability.
So look around in your region for reloading classes cause even a one day session will get you started.
Good luck