I've done a couch to 5k before. I mean, it took me a couple weeks to run 5k successfully a few times before I kind if fell off the wagon.
I'm fairly active in so far as I play tennis at least twice a week, shoot sons hoops a couple times, walk instead of driving to get small groceries etc.
In terms of nutrition, at the moment my plan of action is to eat less
Racquet: Custom Bio Max 200G (~345g) + Sensation Control 16 @55lbs