Looking for accountability and support....Paleo diet

I am an active 59 year old female who loves playing tennis. I have always been athletic and want to continue to lead an active lifestyle. I have Hashemites disease whic significantly decreases my metabolism. I am determined to lose the 25 pounds that have slowly attached to my waist over the last two decades. I am going to Belize in January and I want to be fit and trim for my sixtieth.