Welcome! I love to hear about nursing twins. There's often a misconception that a woman can't make enough for two babies at once, which is usually untrue. 10 months is a huge accomplishment. Congratulations!
I'm still nursing my "baby". He's a toddler now - 21 months old today, to be exact. I've breastfed all three of my boys and really wished I had worked on the weight loss a little more in the early days. My metabolism would have loved that! Now that Jack is this age he's not nursing enough to make much of a difference to my plan.
WW is the best weight loss system to go on as a nursing mom. They always take into account the extra caloric needs of milk production. I know several breastfeeding moms who lost their weight on WW. I'm wishing you all the best as well
(PS: I'm a postpartum doula, so I could really talk about breastfeeding all day. I just need to become as obsessed with weight loss! LOL)