These things are actually really fun to do if you learn how to do it. At the point you know you are in a dream, if you keep yourself from waking up, you can indeed control it. Perfect example, your walking in your house and you notice your parents have one eyeball, cyclops. If you say "Hey, this isn't right, you aren't my parents. This is a dream." You more than likely can do what you want, if you can stay asleep. I have one time waken up 4 times from one dream...I woke up my first time, put my feet over my bed, and woke up again. Second time I made it to the door. Third time I had breakfast. Fourth time I was actually awake and I was pissed that I re-lived my morning three times lol.
To me, the stuff is dead now.I use to do this stuff when I was younger because I had nothing better to do. You won't get it right away, and unless you have a lot of free time, this is not worth it. Go online and look around if your interested, and while your out looking, might as well look at Astral Projection cause its practically the same thing.