Initial Setup

Hi all,
I’m brand new at setting up stuff from scratch.
I have a Balance 20X for my RV that I’m trying to set up and the network isn’t taking
the password that’s on the back of the box.
The IP address for peplink isn’t loading. I’ve been able to register the device, but can’t change the password
from my account.
Suggestion? Help is appreciated.
The network immediately comes up in my list of available networks.
So, since I can see it wirelessly, do I NEED to use an Ethernet cable to set it up? (I found a YouTube video and the guy
did that, but since I have the IP address, I didn’t think I had to do that.)