Not 100% sure what you've done so far, but it sounds like you have added a domain and php/mysql already? (if not, check the easyengine create command).
I don't know orangescrum but I did notice they state Apache as a requirement for the web server. As easyengine uses Nginx you might want to check orangescrum to see if it will run under Nginx (pretty sure it will), and if they have a guide to what you need to do differently.
Other than that, it just looks like you need to need to follow the 4 steps above - it's not really an easyengine thing from here on (you can use the standard MySQL command line tool or phpmyadmin for creating/importing databases).
Re: moodle, do you mean on the same server or on the same domain?