Comprehensive communication program

I’ve looked at it. Pretty much saying use element but how? It isn’t in the repos, it can’t be installed as a flatpak and I definitely do not want to touch snaps.
edit:
Nevermind found how to.
edit 1:

Tried that and didn’t work
edit 2:
What is going on with source.puri.sm? I can’t reach it to follow anbox install instructions. Can’t reach with clear, proxies, tor and isitup.org says it is down.