sweetie , the 2kg dumbbells are just way too light your not going to get much gain out of them, the 5kg will be a good start as long they provide you with a bit of a challenge
The sets/reps will vary depending on your ability to do them, but with that weight, I doubt you'll have to worry about it being too much.
Work-out 1
DumbBell Shrug 3-8
Shoulder Press 3-8
Lateral Raise 3-8
Rear Lateral Raise 3-8
Work-out 2
DumbBell Lunge 3-8
DumbBell Squat 3-8
DumbBell Straight-Leg DL 3-8
Single Leg Calf 3-8
Work-out 3
DumbBell Bent-over Row 3-8
Pull-ups
DumbBell Curl 3-8
DumbBell Concentration Curl 3-8
Work-out 4
DumbBell Bench Press 3-8
DumbBell Fly 3-8
DumbBell Pullover 3-8
DumbBell Kickback 3-8
Tricep Extension 3-8
Also what is your diet like