You can install Android applications from the command line.
1
waydroid app install xyz.apk
Copied!
The apk files you will sometimes find on the internet tend to only have arm support, and will therefore not work on x86_64.
You may want to install F-Droid to get applications graphically. Note that the Google Play Store will not work as is, because it relies on the proprietary Google Play Services, which are not installed.