I am using live media install and when I hook up to the internet and check for updates for the installer it loops through checking for update, saying I have the latest version and freezing when I choose install and English.
Antergos live media install freezes after I select language
If I remember correctly (I installed my Antergos two months ago) this also happened to me, but I canceled the installation (took some minutes to cancel, everything seemed frozen) and tried again. Second or third time it worked.
open a terminal and have an eye on cnchi logs, while installing will give mostly some output when something is not working:
tail -f /var/log/cnchi/cnchi.log