Why not honor the goddess in a ritual so that she comes to you and then ask her? Gods and goddesses took on priests and priestesses of them as something like adopted children. This is most likely the case with you, another life perhaps or merely spiritual existence.
She would be the best source to learn about how to control your gift. Such deities are hard to handle for our physical minds. Many such deities can cause their patrons to go insane when they cannot grasp full understanding and maintain balance within themselves. She is interchangeably used with the war goddess Enyo, so you may be able to find more info on her more accepted personality within those referrences.
She is also known as Discordian and their is a full religion surrounding her. You should research it.
She is the daughter of Nyx, so I would suggest asking Nyx for guidance as well. Including Nyx in your worship may help you to remain balanced seeing that she is more powerful than Eris and would know her children well enough.