You should maybe read about the use cases for deduplication before using it. Here’s one recent article:
https://despairlabs.com/blog/posts/2024-10-27-openzfs-dedup-is-good-dont-use-it/
If you mostly store legit Blu-ray rips, the answer is probably no, you should not use zfs deduplication.
Have you considered other distros? I’ve had lots of success with the immutable fedora variants, which offer great stability and NVIDIA drivers in the base system. If you need apt, you create a new Debian container in the box buddy and make that container be your default when opening a terminal.
Gnome variant: https://projectbluefin.io/
KDE variant: https://getaurora.dev/
Gaming variant: https://bazzite.gg/
They are all the same distro with different desktop setup and default apps. You can install one of them and seamlessly switch to another one without losing any data.