You can sign with amber 👌
Discussion
Tell me more about Amber
Is a signer, you put your nsec there to do safe logins.
You definitely need to check Amber out
I use a Google pixel 6. Uncertain as to how to install the softs.
I need a solid walkthrough written for a five year old.
Is it degoogled or Android stock?
Anyways, you have a bunch of options:
1) For Nostr stuff, try zap.store
...it's an alternative store hosting FOSS apps
2) Fdroid, where you'll find all Foss apps. There are a bunch of other frontends like droidify, but at the end is all the same. Fdroid.
3) Obtanium. Install it from Fdroid, then you simply need to go to the github repository (or other repository) hosting the APK you need, copy the link and paste it into Obtanium. It will download and install the Apk and will constantly check for new releases of the software
4) Aurora store (google play). If you're on degoogled, try Aurora store...it's a front end for Google Play Store that does not need a login nor google account. You can basically find all the missing stuff that you didn't find on zap.store , fdroid or github.