You need not contact anyone, the worship of gods and goddesses no matter their origins is a personal choice.
In Ancient times, date undetermined.
Greek Mythology does not come with a start date.
Yes. By worshipping the gods the greeks started the Olympics (named after the Olympians which were the 12 major gods) because they thought it would be a great way to show the gods they're skill.
Worshipping the gods.
after the golden age
I believe you're asking about Pallas Athena,who was a greek mythological figure.In which case, pallas only "lived", (or existed) if your religion entails worshipping ancient Greek gods.
worshipping many gods
In prehistoric time.
They were the religion of the ancient Greeks.
There are none
Isis (Egyptian) Iris (Greek)
ummm because thet thought that he gods were in the caves and by worshipping the caves they were worshipping the godds