Take a deep breath, get ready, throw the drachma and ask a question to any demigod you can think of - send them an Iris Message and taste the rainbow.
Please make sure you specify to whom you're asking the question in your message as to avoid offensive answers from rather rude Ares children or nauseatingly long explanations by overly excited spawns of Athena.
P.S.: Please, remember, the oracle will only get in touch with *demigods*. Questions to creatures, monsters and gods will go unanswered. Also, please avoid hitting on the half-bloods, this makes the oracle uncomfortable.