It's pretty easy to get started in reloading, the only challenge right now continues to be limited powder availability, and limited brass. The brass is no big deal if you have been saving your rounds. Powder is a little tougher, but it's more available now then it was last year. Probably will get better.
If you want to start you need to figure out your budget. Then buy a press, dies, case prep tools, powder measure of some sort, bullets, powder, primers. I've had great luck producing more accurate than factory rounds for my 300 win mag, .270 winchester. I've struggled a bit with .338 lapua (might be lack of Retumbo powder availability); 30.06 because I haven't experimented a lot. I was reloading for .308 a little bit before I traded off my Savage 10FP mcmillan, I hadn't yet worked up a load that was better than Federal GMM, or even Hornady Steel Match. both of those shot better then my reloads, but I didn't try very hard.
I've had good luck with a Lee 4 hole turret press, lee dies, lee case trimmers. Less pleased with the lee reloading scale I got with my press - quickly decided I needed to spend a couple hundred on an RCBS electronic dispenser. I bought a Lyman case trimmer for $100, realized it produces more runout than I'd like, switched to the lee case trimmer that includes caliber specific length guides, and a simple tool that you can chuck up in a cordless drill. Results in consistent trim length, with only about 0.001 runout vs. the Lyman tool that would produce 0.003 runout on trimmed cases. You'll also need a priming tool, I like the Hornady tool, but it isn't compatible with the lee shell holders, as large primer setup won't work, so you need to by Hornady or RCBS shellholders. The Lee EZ prime is junk compared to a Hornady tool.
Buy the Hornady or Lee reloading manuals to get good step by step instructions. The Lee manual tends to include more powder types per caliber than most other manuals, but a lot of the data is freely available online through powder or bullet manufacturers. It's a fun, time consuming hobby. I've been doing it 3 years now, and I've paid for my equipment based on cost per round, but I shoot a lot more now, so it's really kind of a wash. But I can load better bullets than what is readily available off the shelf.