New Co-Author Story Opprotunity

Hey i'm interested but i've never wrote a fanfiction before i do want to try/start i have had a few ideas of my own but i have never got round to putting them to paper so yeah i am interested in doing it and i do know a little about witches ( i watch charmed and i have seen twilight) but apart from that i dont really know much but i do want to give it a go but i'm not sure how good i wll be tho :)