When writing a story take experiences from your life or the life of people you know. You can even embelish a little bit because it's your story and who ever is reading it won't know the difference. And when you have to come up with characters for your story, just creating from people that you know, yourself, or who you wish yourself to be. Making up charaters and plots for them can be very fun. Just make sure that it all ties together and makes sense.