New to this site - not new to dieting

I am 65 and overweight, have been since I was about 9. Struggled all my life to loose weight and now it is just harder and I am heavier, been this weight for about 10 yrs. I would like to loose anything a couple of stone would be good but in reality it should be about 5 stones. My mind is struggling to be in the right place due to family problems over the last few years. Just can't seem to get my mind on the right track. Thought I would try this new site - new start.