Welcome!
Here’s some great resources that I learned when I first was starting out with my analog photography and photo career.
Butkus: A truly unique website experience ran by the King of analog and obscure camera information. If you have a camera, he has a manual for it. Absolute legend for refusing to optimize his website for mobile use and keeping it looking exactly how it was 10+ years ago.
Camera-wiki: Not a true Wiki but very informative resource for researching the world of analog cameras.
The Big Film Database: Database of every film stock ever made that has a DX code on it (the barcode on film canisters).
KEH and MPB: While eBay is the used camera King, KEH and MPB have better vetting and quality control for the used cameras they sell.
Freestyle Photo, B&H, and Adorama for if you need to buy film or anything else KEH, MPB, eBay or your local camera shop won’t have.