Relax, show a willingness to learn and you’ll be ok.
I got my start working for university IT and made it all the way to a CS Ph.D. and into industry.
Edit: and get good sleep! It’s nearly midnight on the West coast, get as much good quality sleep as you can.
Using your own WiFi router also bypasses the wireless security settings to access the school network.
Some resources are only available while on the network (printers, access to library, academic papers, other student hardware). Now imagine a random person in a coffee shop next door had u limited access to these resources via an unmanaged access point.