I try to stay physically fit through proper nutrition and light to moderately vigorous exercise, do you do similar things?
I need to! It' been a while but I was way into fitness. Now my fitness is fitness this donut in my mouth. What all do you do? Way interested. 
Well you can start by just walking 30 minutes a few times a week, and then build into some kind of physical exercise like swimming or weight training. I like weight training because I like seeing my muscles grow and I find it enjoyable.