Thanks for all the great responses. I'll grab the book and do some more research (youtube, r/reloading), hopefully take a class too.
I'm most interested in pistol and rifle reloading. I'm not sure it makes sense for me to reload 9mm (yet), but I'd like to be able to. I shoot very little 45 colt (unjacketed, <850fps) loads, but would probably start with that since they're pricey and harder to come by. I don't shoot much rifle, but would like to be able to load for 308, 5.56, 7.5x55. I have a bunch of 7.5x55 brass I have saved. Most is GP11 that I believe can be converted to Boxer primer with some work.