This configuration is started from the kickstart template located here: https://github.com/nvim-lua/kickstart.nvim
Clone down this repository to ~/.config/nvim, pay attention that this is the final path, and not ~/.config/nvim/nvim or something else. It should then load all the required plugins and settings the next time you launch neovim.
For now I use the same bindings for at least telescope as TJ from kickstart. You can check out his video tutorial if you need help learning the shortcuts and how to teach yourself what is available.
The main init.lua file only requires from the needed modules.
Under lua/core you will find this structure:
plugins/
lazy.lua
mappings.lua
The plugins/ directory contains all plugins, each separated by a file. To add a plugin simply create a new file in this folder, returning the required plugin information.
The lazy.lua file contains the package manager, which will load each file under plugins/.
The mappings.lua contains "global" mappings, or rather mappings I don't know where to otherwise put, as they do not belong to a plugin.