@greenwaydev Here is a great tutorial that can help you learn your way around MM.
https://forum.magicmirror.builders/topic/236/complete-setup-tutorial/6

I would recommend, once you get your MM configured the way you like to make a back up of it using win32 disk imager (make sure .img is on the end of the file or it won’t save as a disc image). That way if you mess up your SD card somehow you have a back up to use.