Connect to the Internet via VPN on my Mac and a VPS instance

To establish VPN, I chose WireGuard that I’ve used it to publish the Pleroma server to the Internet.

Just followed https://bike8615.blogspot.com/2019/08/wireguard-ipv6.html to configure it.
Almost all configurations can be used without changing, but in my case, eth0 written in the article should be ens3 because SAKURA VPS instance’s network interface is named ens3 instead of eth0.

【D&D 5e】 Temptation of Amber (途中セーブ)