wmcig it's a command-line program, so you have to use it in a terminal - for example:
cd path/to/where/you/want/the/box
vagrant init box-name # (e.g. generic/alpine315)
vagrant up
you can skip the init
step if you already have a Vagrantfile to provision the VM with. and you can find boxes here: https://app.vagrantup.com/boxes/
once it's booted you can run vagrant ssh
, or open Virtualbox, to interact with it.