What to Look for in a NAS?

This week I finished setting up Arch Linux (It felt so good to nuke Windows 11 off my laptop!) and GrapheneOS for my new Pixel phone.

I am interested in getting a NAS for multiple purposes such as accessing files, hosting a small website, and to upload security camera footage to name a few.

Is there a particular brand to buy? I'm basically illiterate when it comes to networks aside from what an IP is and what DNS is. Any suggestions for books and reading material is greatly appreciated. It feels liberating to know more than I did before with tech!