I was in this same situation a couple of years ago and easily managed to move to a comoletely Google-free life for 3€/month. I've documented it on my blog [0], but here's the summary:

- mail-in-a-box for email

- NextCloud (included in mail-in-a-box) for contacts, calendars, and files

- LineageOS for MicroG for Android

- OpenStreetMap for maps

- DuckDuckGo for search

- Firefox as internet browser

[0] https://blog.ideotec.es/leaving-google-foss-journey/