Anbox isn't starting up on my PC at all

What worked for me is running the session manager then clicking on the icon.

first run session manager by entering this command

anbox session-manager

and then click on the Anbox icon from launcher

Better way would be to add this service inside Startup Applications

to do that open Startup Applications > Add > in command write anbox session-manager

and you'd be able to use Anbox without running that command on every boot or keeping a minimised terminal windows.

Start up Application