There is no play book, dogma, doctrine that we can point to to learn Druidry. There were no written records and little actual historical documents other than those tainted by those in opposition to the Druids. So why study this path? What is authentic about it? We have the Celtic myths that give us some color, but I am a big fan of moving forward not backward, we can’t evolve backward nor can we live our lives today based on norms and standards from an ancient people.
I think that is what is great about being a Druid, you can learn about Celtic peoples and some about what Druids represented, but you have to internalize it for yourself and make it your own. Some things you can look deeper into to help along the way:
About ancient Druidry
Ancient sites in Ireland, Scotland and Wales
The Tuatha de Danann and the Sidhe
Land of the Living
Celtic Gods and Goddesses
The Dragons of Power: Earth, Sky and Sea
Seasonal Celebrations; Imbolc, Ostara, Beltane, Litha, Lughnasadh, Mabon, Samhain and Yule and see how they resemble “Christian” holidays
Incorporate ritual and moon phases into your life. See what works for you.