Group Manager experts needed!

Hi,i recently opened my minecraft server and i need someone good with groupmanager,i want to make donation ranks with certain commands,i REALLY need my server to be running,and make some money off of it,i need someone to teach me how to make them,and the way that people are gonna donate automaticly and they have their rank,i really appreceate it,thanks.
MY SKYPE:hamoodi2471