Welcome and congrats on the 15 lbs/24 inches. That is great!!!
There is tons of info on this forum...as well as a lot of helpful chicks.
As to whether 1600 calories is good for you - it might be a little low to start with... you might want to go a little higher so that you can cut back when you hit a plateau. It's also a good idea to mix it up a little so that your body doesn't get in too much of a routine. As in 1400 one day and 1800 the next.
There is a calorie counters forum here
if you want to check out what others have to say.