I have a very good story in my mind?

I'm a 13 year old, super good writer. I have this PERFECT story in mind, it's historical fiction. I want to write a story of a young girl in Medieval Ireland. I'm not Irish, or European for that matter. I just have this WONDERFUL interest in Ancient Europe (The Barbarians, the Kings and Queens, the Greeks, the Romans, territories, political wars). I have everything planned out (the base of it) But I need to know more about the Irish. the ANCIENT Irish the Barbarian/ Ancient Irish. What tools did they use? What was the typical life of an Irish girl back then? Where they encouraged to use weapons and fight like any man? What clothes did they where? Were axes the fab, or were bows and swords? What were their beliefs and rituals? Who were their gods? What did they practice? What was their goal in life? What was the average life on an ancient Irish person?

If any of you could answer the questions, or maybe send me a few sites where I could GET the info, I would be sooo happy and possibly vote your answer. Thank you SO much if you're reading this, and I hope I'm not making this difficult for you (too many questions...:D)