you need to realize that this is not a diet but a lifestyle change - one that will give you new habits to take with you for the rest of your life.
Spend a bunch of time reading the stickied threads in nutrition, on topic and exercise - after reading -ask questions...
It's really quite simple - come up with a reasonable amount of calories... the thread in nutrition will help you there) keep track of everything you put in your mouth (get an account at ) and exercise moderately (again, the stickied threads in exericse will give you a good starting point)
realize that you didn't gain the weight over night -it' snot going to be lost over night..