The workout I've been doing is Nike Training Club. It's a free app you can load to your phone. The thing I like about it is the variety of workouts. There are close to 300 different routines you can do, ranging from 5 minutes to 60 minutes long, so you choose whatever you have time for. There are also different level of intensity and expertise. For most of the routines you need little or no equipment, some need dumbbells or a jump rope or something. A few need more advanced equipment, I avoid these. I'm older than you, (63), and I'm able to do most of the exercises, though I have to do modified versions of some.