[ OT ] How do I start ?

Yes! This is a great place for beginning writers. Find every single prompt you think is interesting, and *WRITE*! You're not going to get anywhere without accomplishing this step. 
 
 Next step: read, a lot. You want to write stories? Pick a genre or two or three or as many as you want and see what's already out there! Look at each authors style, and try to incorporate them into your writing to make your own style! Do n't just try to copy them however, that would be unoriginal and pretty boring to do. You do n't want to turn it into a chore at all! 
 
 When you think of a good idea for a story, do n't neglect it! Keep a small pad with you and write it down! You never know what could come of it, but if you do n't write anything down it wo n't go anywhere at all. 
 
 Try flash stories, short stories, scribble down ideas, characters, places, things, everything you think you could use somewhere along the line. Then just sit down and write it out! It really is simple and the only reason people think they ca n't write, is because they never tried it. It's really that simple. If you love it, do it!
