Ready for a healthy change

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I am 34 years old and have 2 beautiful children. 10 years ago when I began my career, I weighed 240 pounds. In that year I lost 55 pounds, soon after i met my future husband, had 2 children, etc. I have gained back 22 pounds that I have lost. I just want to be a healthier me. I lost my best friend to a sudden heart attack this past summer. He was 35 years old. I don't want that to be me. I would like to get a support group. I need to be held accountable. Any advice is welcomed.