Trying to set up astrobox

I am trying to make an astrobox gateway. I have flashed the sd card and put it in my raspberry pi 3B+ It says to wait to have it boot up and then it will start emitting a hotspot, but I don’t know how to know if it has been booted up. It also hasn’t emitted a hotspot named astrobox ####. Also, I am trying to run the astrobox through browser but the page on that doesn’t give very much information and the video it gives is unavailable. Any advice? Anyone set up a astrobox before?