My recommendations:
Organic Maps -> CoMaps (they got forked because of some bad decisions.)
Brave -> Helium (has full uBlock Origin and Ungoogled Chromium patches, and no crypto bloat)
LibreTube -> PipePipe (has some nice features like live chat, and less buggy in my experience)
LibreOffice -> OnlyOffice (has better Microsoft Office compatibility, and easier to use in my experience)
Disable your third-party DNS, that only works to make you more identifiable as you're already using a VPN. You can also use Syncthing to sync your password vault etc. between your devices. I'd also recommend using Posteo instead of Tuta because it is cheaper and its privacy policy is kinda better.