Where has my body gone?

:) Okay, today is the day for me. I am so tired of constantly not feeling good about the way I look. I don't think I'm severely overweight, but I'm sure not what I used to be. Forget that; I'm not what I want to be right now. Infertility (not that I want to use that as my crutch) took such a toll on my body and on my spirit. Having Lily now, I want to be the best I can be for her. I want to be healthy and know that I'm doing all I can to be in shape. Not that I'm giving up ice cream; I'm not a crazy person:) But, I do want to start exercising daily. And I want at least 75% of what goes into my body to be healthy. It's so tough living with a man who can eat whatever he wants and as much as he wants and not gain an ounce. Any tips? Taking walks with Lily is an easy way to get some exercise, but do any of you do anything you really love? I used to love the Tae bo tapes, but they are surely not for a beginner like I am now. Am I a total nerd if I buy the Dancing with the Stars workout tape? Don't make fun. :) Any tips would be great!