Start by doing a lot of digging. There is very little known about the actual practices performed in ancient Greece. There are a few modern pagan groups running around though that use the ancient Greek as inspiration.
As far as conversion: Simply start by making a declaration of allegiance to the Gods and Goddesses and then begin practicing based on what you were able to learn from your research.
Greco Paganism
Their religion was what we call the Greek myths., Today, it would probably be referred to as "Paganism".
It's known as Norse paganism.
Norse paganism.
He managed to convert much of Ireland from paganism to Catholicism.
Some aspects of ancient Greek and Roman paganism are reflected in the Catholic faith, particularly in its system of patron saints. The clothing used by Church hierarchy is said to be based on those used by officials in the Roman empire.
Ancient Greek
The origins of Christianity are clearly in the early Jewish faith. Some see further influences from Greek paganism and ancient Greek philosophy, particularly Platonism. Others say that Christianity could have evolved from the mystery religions.
unknown, you have to remember that this is an ancient belief that has remained on this earth probably since the humans used stone tools for hunting. greek mythology is thought to have branched from pagan beliefs/ex. odin is same as zues
It was mostly Hinduism and various forms of Paganism.
An Ancient Greek is a native or inhabitant of Ancient Greece, the Greek-speaking world of ancient times.
The origins of Christianity are clearly in the early Jewish faith. Some see further influences from Greek paganism and ancient Greek philosophy, particularly Platonism. Others say that Christianity could have evolved from the mystery religions.