If you don't care about government surveillance, stock lineageos is a completely degoogled android distribution. You could install it for example on a galaxy s1

If you don't care about government surveillance, stock lineageos is a completely degoogled android distribution. You could install it for example on a galaxy s10 or similar android phones. Careful when flashing, you might brick the phone, cause the bootloader isn't open. You have to enable booting custom firmware before flashing (ask me how I know XD). Then get f-droid as a non-google playstore. There you can get osmand as map and navigation, it's pretty great, but of course doesn't have current traffic data like google maps, cause it doesn't know what everybody is doing all the time. I used anki flashcards 10 years ago to learn japanese, no idea if that's still the recommended option. If you do care about government surveillance I'd recommend the pinephone pro, but that'll be much more work with less usability.