Having trouble with setup (RBK50 and Fios Quantum Gateway)

Thank you -- I really appreciate your help. (Your video is amazingly informative and very easy to understand!) Unfortunately, I am still stuck. When I try to connect to the orbi wireless SSID, I am told "no internet." (But in my list of networks, the network appears with the label "disconnect," suggesting that I am connected to the network even if the network is not connected to the Internet.) When I go to orbilogin.com, I get the message that says "Looks like you're not connected to your Orbi's WiFi Network" and it won't let me proceed (I followed the troubleshooting instructions and cleared my browsing cache and went back to the page, and still got that message.) I have disconnected my fios router and orbi router, waited a minute, powered on the fios router, waited for it to get fully online, then powered up the orbi router and waited for it to fully power up. Still get the "no internet" message. I tried to run setup again in the app, and get to the end only to find "no internet." There is an advanced setup option, but its only options are "static IP" and "PPPoE" -- I don't understand either of those.   I am sorry to be so inept.