I have so many great ideas! I've completed several stories in my head but i've never put any to paper. How do I start? How do you start?
This is a tough question to answer, because everyone has different methods that work for them. What I would suggest is to literally just start writing about anything you want to write about. Put down words, even if they don't make grammatical or syntactical sense, because you can fix all that later. Just try and keep the thoughts flowing from your mind to the page. Also try completing some writing prompts and exercises if you're not sure where to go or how to start. This site writingexercises.co.uk has cured my writer's block so many times.