@moris The basic installation of MagicMirror includes a sample config.js file. It’s located at ~/MagicMirror/config/config.sample.js
If you copy or rename that file to config.js that should help get you started. cp ~/MagicMirror/config/config.sample/js ~/MagicMirror/config/config.js Once you have it copied, you can restart your mirror and it should use that simple config.js to run the mirror software.
Installing other modules is pretty simple. Navigate to the modules directory: cd ~/MagicMirror/modules and then clone the module repository git clone [module url]. Follow the directions at the GitHub repository for that module in case there is anything special about installing that module.