Hi Christina! I've only been a member for a little while myself, but I've been exploring the forums for quite awhile - the tutorials are excellent, everyone's friendly and helpful, and I'm sure you'll learn a lot. Writing stories down is pretty hard. Mapping the world out will probably be pretty helpful for you, and at least you'll have some great art.
Welcome to the forums, and don't be afraid to share your world, stories, thoughts, questions, etc. Good luck!
PS - you're English is great! You have the courage to write in English, so I'm sure you have the courage to write your story.