My setup is simple:

• Pictures: I don't take many and rarely look at them tbh. So they just sit on my laptops NVMe
• Music: I only ever use cmus for listening to music => Therefore music is also only locally on my laptop, managed with beets
• Movies/Tv Shows: I have jellyfin running on a raspberry Pi 4. For single user use this works fine (even transcoding DVD quality works). For multi user or higher resolution transcoding this probably won't work.
• Backups: One off-site backup at a cloud storage provider using restic and one backup on a USB hdd I simply plug in every other week.

My recommendation is: Keep it as simple as possible. In the past I created the craziest setups, but it turns out that in every day life I have neither the time nor motivation to maintain that shit.