It is totally possible to control what's happening in your dreams but it isn't accessible to everyone, I don't think, sadly. I have had a lucid dream ONCE but haven't been able to recreate the circumstances that spurred it on. I've heard that sleeping outdoors helps for some reason, checking the time on a clock regularly throughout the day, making a habit out of checking that you are awake and being aware of being awake throughout your day. I don't know how effective these things are, just ideas I've heard to help encourage lucid dreaming. Just read up on it and think about it often, that might help.