What’s your configuration, if you don’t mind sharing?

I second Synology. Have similar background (no IT experience). Bought a d923+ and have been setting up different options. Within 6 months I have setup:

• a self hosted Immich account for all my photos (downloaded everything from Google Photos)
• Plex for all my media (unexpected benefit, no longer paying for several streaming apps)
• local backup for home/exterior video cameras

I highly recommend Marius Hosting for simple, step by step, guides. For example: https://mariushosting.com/how-to-install-immich-on-your-synology-nas/