ah. well 14 is fine for the site. [i started my year and a day when i was 15] the only snag might be immaturity. not saying you are, but we all have those moments where you yell and scream and refuse to believe something, or you do something silly as a result of age. but that's no big deal really, so long as you try to keep a calm clear mind.
well there are Christian Wiccans out there, [which sounds like a bit of a contradiction.] the Christian God's biggest rule is to have no Gods before him, so believing in 'God', The Horned God, Ra, Zeus, and Odin might end badly. [there's also the bible verse condemning witchcraft which could throw yet another wrench into matters] the best advice i can give to you is to ask 'God' for advice. one thing many pagans believe is you can communicate with the gods without the need of a middleman [a priest] so ask him. 'God' might not appear before you, but you could have a dream with the answer, or a feeling, just be open. you could also ask your minister/priest but they'll probably give you the 'it's evil' response. good luck.