Have you looked into getting a Start9 server? What web browser do you use?
As for your question, I made the switch over to FOSS and tech sovereignty last year! In addition to what you've got going on, consider Standard Notes for your notes. Obviously, Graphene OS if you have a Pixel phone. Binary Eye for a QR scanner that allows you to see what the code contains before opening it.
I'm currently working on switching from Google Photos to Immich. I need to start using OsmAnd~ instead of Google Maps, but Gmaps is just too powerful ðŸ«
If you have an Android then you can essentially replace every Google/Samsung/proprietary essential app with a FOSS alternative.