Replying to myself, here is what I did to make it work 
sudo apt purge rtl8812au-dkms
sudo apt install git
git clone https://github.com/gnab/rtl8812au.git
sudo cp -r rtl8812au /usr/src/rtl8812au-4.2.2
sudo dkms add -m rtl8812au -v 4.2.2
sudo dkms build -m rtl8812au -v 4.2.2
sudo dkms install -m rtl8812au -v 4.2.2
after that, I just ran the “wifi” command and the adapter was found. I entered my ssid, password, and it connected. It wrote config. Then, I rebooted without Ethernet plugged in, and it auto-connected 
