The instructions to use MyAstral are here:
https://myastral.org/pages/guide
A short English tutorial of MyAstral. By Ciro Discepolo.
http://www.programmiastral.com/download/A_short_English_tutorial_of_MyAstral_by_Ciro_Discepolo.mp4
A long Italian tutorial (44 minutes) to learn using MyAstral:
http://www.programmiastral.com/download/Un_tutorial_in_italiano_di_MyAstral.mp4
A long English tutorial (44 minutes) to learn using MyAstral:
https://player.vimeo.com/video/695625519?texttrack=en