easy and affordable WiFi adapter for Debian 10 on a Dell Optiplex 9010?

I doubt my abilities to do much configuring. I did install the non-free version of Debian, though. Also, I think paying more than $30 may be too much.
A YouTube video suggested 802.11AC Dual Band USB Wireless for my particular PC, but that wasn't taking Linux into consideration.
Now I am using an ethernet for that PC, but do have a router from the internet company.