First step to a new me

I'm just getting started with MFP. My name is Karen and I am a 42 year old mother of twins. I had lost 101 pounds after my twins were born but after multiple surgeries for cancer gained about half of that back. I can't wait to be back to my lighter healthier self. I lost my weight last time with Weight Watchers but wanted to try this instead. I have a bachelors degree in Nutrition Science so I know the mechanics. I need friends to do this with to be successful.