The image is a snapshot. There is no 5GHz support.
Luci (web interface), openvpn and nano editor will be installed just in case.
Download from Firmware LEDE Upgrade URL the .bin file and rename it as factory.bin otherwise installation will fail.
apt install tftp
Turn off wireless if there is one and assign this address to the interface
ifconfig enp3s0 down
ifconfig enp3s0 up 192.168.1.10
Disconnect routers wan and connect computer eth with routers lan port. Now on the router remove the plug from the back and hold wps button while pluging in power, keep pressing wps for 3-4 untill power is blinking.
Let it start again and take out power again.
With a toothpick keep pressing reset button for 4-5" while powering up, take out the t/pick , now at the terminal navigate to where factory.bin file is and connect to the router via tftp
and let it reboot, it will take 2-3 minutes.
Connect routers wan to your wall plug.
Now connect to the openwrt/lede with (passwd is not set yet)
and install luci,nano and openvpn packages
opkg install nano
opkg install luci
opkg install -force-depends openvpn-openssl luci-app-openvpn
That was it, now visit 192.168.1.1 and enjoy the web gui. Further settings can be done via the web face and more themes are available to download and install but this is out of the scope of this posting.
Don't forget to set a passwd for the root user, can be done via ssh or via web gui.