Wireguard creates a VPN (Virtual Private Network) tunnel between a the Android device acting as client and a Wireguard server.

Install the Wireguard App and create from scratch a new tunnel

Give a name to the VPN tunnel and define the Interface by creating the private key and getting the public key, add the address received from the wireguard server administrator.

Copy and past the public key into a mail to the wireguard server administrator

Define the Peer (the connection information of wireguard server) with the values from the wireguard server administrator. In the example 3 IP address ranges are listed. The Android device is allowed to be (DHCP) in those networks.

Turn on the VPN tunnel

Test the VPN tunnel using a browser do not use https use just http or simply type in the IP address