Last year, I started the year at 212 lbs. I am 164 lbs at a recent check. Everyone's different - for me, I was eating okay, it was a lot more about just getting up and moving around. I do a lot of walking - an hour or more 4 or 5 times a week to maintain, I used to do about 1.5 hours every day when I was working on losing weight.
For me, the lesson I learned for my middle-age body is that everything you do as far as exercise should have the goal of not hurting yourself as the primary goal. Before I figured out I liked walking, I tried running, bicycling, etc, but would inevitably get hurt by overdoing things, and then I wouldn't be able to do anything for months - it was counter-productive. I don't get hurt walking (with good shoes - I wear good boy running shoes for my large, wide feet).