After having experimented with a specific initial setup I realized I had a too complicated setup (too many profiles) which makes it hard to adopt grapheneOS. I therefore would like to optimize a bit and move from 5 profiles to 3 + 1 private space.
However, I fail to see how I can install apps (stores like f-droid, aurora, or other apps) that are not in the GrapheneAppStore (or Accrescent, which I could install from GrapheneAppStore).
I did not find anything in this forum, nor did I manage to install it along the official Android Help Article (here: https://support.google.com/android/answer/15341885#install_apps).
In reality i'd like to first install a VPN in the private space before anything else.
Starting to feel really stupid... Can anyone explain me what I got wrong here?