I typed ipconfig /all
what's it supposed to do?

It's a gaming pc and I asked them to make it so I can play games online so I'm pretty sure it has wifi, I'll edit the original post and put the specs in

So do I have to use a cable? Shouldn't I be able to do it wirelessly?
and it's not the cable because I used it for something else before

I clicked view your network properties and it says my network description is: Realtek PCIe GBE Family Controller. I hope it helps

I just got my first pc and I turned it on and I tried connecting it to the internet, there was no routers showing up so I troubleshooted and it said I didn't have an Ethernet cable plugged in but...