In my experience, ripping my DVDs is easy. On most Linux distros, mplayer will either do it out of the box, or you'll need to download a single extra library.
Blu-Ray is another matter. As far as I can tell, it seems to involve a lot of tracking down the right keys from the internet. Maybe someone who's better plugged into the digital piracy scene and will have more perspective. I just wanted to copy movies onto my NAS so I don't have to look for a physical copy on my shelf. Maybe it's easier now, but when I tried a few years ago, the effort of tracking down decryption keys so I could copy my Blu-Rays wasn't worth the trouble.
The problem you're referring to is how BD encryption keys are rotated as they are compromised. When a player gets reversed and the keys dumped, the organization basically revokes those keys for any new discs going forward. Practically, this means that things like when your particular BD was pressed matter for what keys you need. It's a pain in the ass; deCSS was much nicer.
e: apparently since I last used it makemkv now finds as many of these on its own as it can: https://www.makemkv.com/svq/
MakeMKV is the easiest route. On Linux I found it was way easier to just rip the disc with MakeMKV and watch the file than to get a Blu-ray to be read by VLC.
MakeMKV makes it incredibly easy. There are still a few Blu-Rays I remember giving me trouble, but it was a matter of untangling a web of annoying track numbers that weren't in chronological order (something like that).
4K UHD Blu-Ray discs are another matter though; I still have a couple of those I haven't been able to rip.
Blu-Ray is another matter. As far as I can tell, it seems to involve a lot of tracking down the right keys from the internet. Maybe someone who's better plugged into the digital piracy scene and will have more perspective. I just wanted to copy movies onto my NAS so I don't have to look for a physical copy on my shelf. Maybe it's easier now, but when I tried a few years ago, the effort of tracking down decryption keys so I could copy my Blu-Rays wasn't worth the trouble.