Momma getting healthy

Hello all. I'm 28 years old, married 6 yrs with 3 children (ages 6, 4, 1). I was a size 12 before the birth of my first child and have steadily been gaining weight ever since. I'm now a size 20, weighing in at 241 lbs. My bff and I are on a joint mission to shed the lbs and get healthy so that we can be around for our kids and be more active with them as well.