Grab a copy of The Witches God by Janet and Stewart Farrar to help you in your studies.
The Horned God [ignoring things like the Oak and Holy Kings and The Green Man] is the king of the forest/field. He is born on Yule, and as he grows he meets the Goddess, marries her, dies with the harvest so w. may live, and is reborn once again on Yule. Each holiday tells a new part in the story. Some say he is a sun God since his strength grows/weakens with the sun, but this is a newer concept I would choose to add to your path after some introspection.