I just recently started reloading in the mid-70s it's a great hobby/disease, most of my guns have never had a factory round thought them. If I never picked up another piece of brass, I'd still have a lifetime supply, but still can't walk past a piece without picking it up. I started to save money that didn't really work out, but now it's all about tuning loads for guns or courses
YouTube is a great resource. Look for videos from people who are gunsmiths and/or competition shooters also bullet manufacturers. Take everyone else with a grain of salt. There are some real screwballs out there dispensing their "wisdom".