RGB LED Display Matrix

Why can’t someone please help us newbies with coding for Adafruits RGB LED Display Matrix Bonnet like what do I do after I download hzellergithub.com program how do I make it work?can someone explain step by step these YouTube videos do use no good because I don’t know what to do with the code!So please for the grace of losing my mind please help me!!

no one here is paid to do this. But if you bought from adafruit, they should support the product for you and point you towards documentation and help