Hi @8i8 welcome to the /e/ community.
Do not start Easy Installer on Day 1! Keep those tabs open and keep reading 
Have a read of this:
The manual instruction set is linked from this page:
https://doc.e.foundation/devices/starlte
I suggest you read this a few times, remembering that Easy Installer is going to do all this for you, with your cooperation!
Please do ask again!
Bon chance