The laptop I'm using is an old HP Stream (I can't remember the exact model number), and I made a noob mistake and forgot to check for an Ethernet port. Apparently this laptop doesn't have one and I'm kicking myself for making that kind of mistake.
The server I'm trying to install is Ubuntu 20.04, and I didn't select the option to use third-party things during installation. So now I have a server that can't install new packages since it doesn't have a connection to the internet.
Should I just figure out how to uninstall it and start over, or am I missing a very obvious answer like how I missed the fact this laptop doesn't have a freakin' Ethernet port?