Hi Melinda - Welcome to 3FC. There is a great section called 300+ that you might want to check out, because sometimes it just helps to talk to others who know what it is like to be that size.
Regarding your calories, that may be a little low for you to start out with, especially if you start exercising a lot. If you find you are hungry a good bit you could probably bump yourself up to at least 1750 for awhile (I am at 2000) , until you start to shrink. If 1500 works for you, that's great - I just wanted to let you know not to be too worried about bumping it up a bit higher if you need to.
86 pounds down, now for the next bit - fourth short term goal (back to 100 down):