I'm 19 years old at the moment, I weigh 61kg (132 pounds) and I'm 171cm tall ( 5"9) I've been following a full-body workout (3 days per week) for about 6 months now. I can definitely see my gains. I'm not backing down now. I'm considering training 3 days still and go like this:

Day 1: Pushup 3x15. Dumbbell Floor Press 3x15. Lying Dumbbell Extension 3x15. Seated Dumbbell Press 3x15. Dumbbell Shrug 3x15. Standing Dumbbell Curl 3x15.

Day 2: Dumbbell side bends 20 on each side, 3 sets. Situps 3x20. Leg rise 3x20. Plank 3 times, 60 seconds. Bicycle crunches 3x15.

Day 3: Dumbbell calf rise 3x15. Stiff leg deadlift 3x15. Dumbbell lunge 3x10. Squats 3x10.

This would be advantageous to me because my schedule constantly changes and (I think) I can train 3 days in a row if I have to, having time for recovery (please correct me if I'm wrong)

Would it decrease my gains? Remember that I'm planning to work out hard. Any other advice would be appreciated!