Thanks for the advice!
My Apple devices are from work and we are able to use them privately with admin rights. On my private account I have mostly open source software like Quodlibet for my music collection, Firefox, Inkscape, and so on. My Mailaccount is from a small German privacy by design provider. I have a Synology NAS I run Paperless NGX and Jellyfin on. I switch Operating systems regularly.
I think I am well set up 😁.