How to boot system with systemd as init system (PID 1)

I am using a Ubuntu terminal environment installed with Windows Subsystem for Linux (WSL). The version is Ubuntu 20.04.1 LTS (GNU/Linux 4.4.0-18362-Microsoft x86_64). Following instructions from various sites to setup a Wireguard VPN server on my WIndows 10 PC, I issue the following commands:

systemctl enable wg-quick@wg0.servicesystemctl start wg-quick@wg0.service

This results in the following error message:

System has not been booted with systemd as init system (PID 1). Can't operate.Failed to connect to bus: Host is down.

I have spent several days researching and am now thoroughly confused about how to proceed. Can anyone please help me.