FIT CTU Prague student, Android developer, and technology enthusiast.
Git projects and system configs are on GitHub (see etckeeper), the reset is synced to my self-hosted Nextcloud instance using their desktop client. There I have periodic backup using Borg for both the files and Nextcloud database.
What are you not sure about the Android telemetry? Or what problems in this field do you expect without a Google account?
And also courious, what type of signing does Gmail provide that others don’t? You mean PGP or S/MIME?
Shut up and take my money!