Hi! Welcome. I did eDiets for a while, & it was nice but I just couldn't find an eating plan that really suited me. And you're technically not allowed to do it while nursing, so I had to lie about that.
Then again, with Weight Watchers you're only allowed to do the meetings while nursing. No one wants the liability, I guess. You
can safely lose weight while you're nursing, but you have to be careful. (If I didn't lose weight while I was breastfeeding, I'd not have lost any at all the last 3.5 years!)
There are a few of us extended-nursing mamas here. I nursed my first til she was almost 3 (child-led weaning fell by the wayside when I decided I
really didn't want to tandem-nurse during pregnancy), & my younger is about the same age as your younger & still going strong. I've got a personal goal of 3 for each kid, but we'll see. I'll have been nursing nonstop for more than six years if I manage that!