If you want to be a creative writer, you've come to the right place! Unfortunately, I can't make you a creative writer, but I can give you some tips on writing stories and becoming a better writer.
READ LOADS! This is really important, as it widens your vocab and gives you good ideas on styles and stuff like that.
Never write more than one story at a time. This gets confusing, and neither of the stories will be as good as they might have been if you'd only been working on one.
Ideas can come from anywhere; always look out for interesting names, people and personalities.
Keep a diary, recording all the exciting or unusual events in particular. Events where you've had strong emotions can be good as well.
Try to develop your main characters very well. The more you "know" your characters, the better the story will be.
Plot the story first and make sure you know all the key events and where the story is going to end.
And, most importantly,
ENJOY YOURSELF!!!!