Need suggestions please. I hit cardio on a regular basis, 4 to 5 mornings a week, 140 AHR for 30 minutes (42 years old). Haven't lifted a weigh in 20 years. Have intentions of starting a 30 minute weight workout at lunch on Mon - Fri (will still do the morning cardio). I can extend it to 45 minutes if need be, but would prefer to keep it closer to 30 minutes.

Any suggestions on routine/program for such?