> Warning: WireGuard is currently under heavy development, and therefore any installation steps here should be considered as experimental. Please do not rely on WireGuard at this stage. We are rapidly working toward a first release that we will consider secure and ready for widespread usage, but that time has not yet come.
You don't get to install software if you only control your end of the tunnel — because the other end is either a proprietary appliance (e.g. a Cisco router; an AWS Virtual Private Gateway) or someone else's computer (e.g. some other org you're peering an [semi-isolated] part of your network with for a shared project.)
Install what? I can install it on GNU/Linux machines. But there are no Android[1], Windows or macOS or iOS packages.
[1] Well, it's theoretically possible to build a custom kernel for some devices, and manage VPN from terminal, but I'm not sure many would enjoy it this way.