Lower Body Workout:

1) Dumbbell Front Squat 3 sets of 8
2) Dumbbell Romanian Deadlift 3 sets of 10
3) Reverse Lunge, Dumbbells at side 3 sets of 8/side
4) Single Leg Hip Thrust 3 sets of 8/side

This trains most of the lower body, with easy setups, and can be done in 20-30 minutes.

One more thing,