Hi and welcome to fitday. You start where you're at.......maybe that's not a pleasant fact but you are now on the right track. Check out the weekly motivational thread for support and posting of goals.
Personally I found that tracking food really did it for me! Log everything!
Fitday start date 12/9/12
Fitday start weight 190
Highest weight Jan 2009 218
Lowest weight Aug 2009 175
Goal 160: ACHIEVED Aug 25/13 (now to figure out how to stay here)
If you do what you’ve always done, you’ll get what you’ve always gotten. –Tony Robbins