Plugpac is to make minpac syntax similar to vim-plug.
This video demonstrates how to install and use it as your plugin manager.
Use this install minpac
git clone https://github.com/k-takata/minpac.git ~/.config/nvim/pack/minpac/opt/minpac
and this for plugpac
curl -fLo ~/.config/nvim/autoload/plugpac.vim --create-dirs \ https://raw.githubusercontent.com/ben...
Also in the video after having saved the init file I forgot to source the file before calling PackInstall!