Hi Newbie16,
I would check with a doctor if you have any health issues or serious concerns. They can relate to you specifically if you have some past health problems, etc. Now, that being said... most of us say screw it, and just start losing the weight haha...
I read the South Beach Diet, and started doing that back in August of last year... I lost 4-5lbs/ week for 3.5 weeks. Then it slowed down, and I lost 2-3, and now I am losing about 1 pound/ week at the current rate that I am at. So as of today, about 50 pounds in exactly 5 months, for an average of 2.5 pounds/ week. I have never been fatigued, I have never been sick from the weight loss, etc. I think the weight naturally comes off a little quicker in the start, then you hit the dreaded plateau after an undetermined amount of time!
No matter what, stay committed!! and keep it going
Best of luck,
-Mellon