breastfeeding and losing weight?

C
I'm 12.5 weeks PP and I feel it is impossible to lose weight beyond the initial of her coming out, fluids, etc.  I was slightly overweight when I got pregnant so I personally have a ways to go.  But lost all my pregnancy weight.  Is it just me or do any of you moms find it not happening for you?  I am only able to walk and not able to get to a gym.  So I'm limited to that.  But anyone have a special mommy breastfeeding diet that works that I don't know about???  I'm not looking to starve or cut milk supply.  Just want something that helps get rid of a few lbs.  I plan to breastfeed for at least a year so I can't imagine having to wait until after I'm done breastfeeding to get some of my body back.