Debian Install - No WiFi (or internet)

I repartitioned the hard drive and installed Buster on my HP laptop. Times as they are I don't have internet at home, so I went to the mall and used their WiFi. I created a bootable USB and destroyed Windows 10. It was great.

What I didn't know was that WiFi wouldn't work after installing Debian, so I ended up with Xfce instead of Gnome. Problem is, I need to get WiFi working in order to connect to the internet and install Gnome and other fun stuff.

I did some digging, found out it's a driver issue. So I punched in the following command:

lspci -nn | grep -i

And it gave me this:

00:0c.0 Network controller [0280]: Intel Corporation Device [8086:31dc] (rev 03)

01:00.0 Ethernet controller [0200]: Realtek Semiconductor Co, Ltd. RTL8111/8186/8411 PCI Express Gigabit Ethernet Controller [10ec:8186] (rev 15)

Question is this:

1) How do I find the correct drivers for my chip setup?

Thanks for any and all help!