Why it fits
The client is licensed under GPL version 3 or later. The client installs without Google Play. You can also host your own package repositories with F-Droid server tools (separate docs).

Getting started
Prerequisites (from the official docs):
- An Android device
- Permission to install an app from your browser
Steps:
- Download the F-Droid client APK from the official site.
- Allow your browser to install apps, then install F-Droid.
- Open F-Droid and let it update its repository index.
- Search for apps and install them; F-Droid notifies you about updates.
Official site: https://f-droid.org/
Documentation: https://f-droid.org/docs/
Notes
The license shown is that of the client repository. The server and repository tools are separate projects.
