A few tips here, if you are wanting to stay at 5kg or use more reps and build bigger biceps:
muscles need 48 hours to recover from a workout. stick to 3 times a week. I know it seems counter productive but if you do more, you will actually make your biceps stop growing, or even get smaller! Once a day!
Slow down and do 2 seconds to lift the weight, and 2 ...
Higher repetitions increases the endurance. It will give you the beautiful biceps shape but to increase size of the biceps you will have to progressively increase the weight.
For now if you want to utilize the 5 kg dumbbells to the maximum, do it as you are doing: 100 or more. Why do less when you can do more? If however you want to increase the challenge, ...
Completely agree with Eric Warburton's answer above: Squats, Push ups, and pull ups should be your basis for training without equipment. When it comes to fitness I'd say the saying
"All roads lead to Rome"
is accurate. However, some are more effective than others. There is a plethora of options for you in the calisthenics area for training. I ...
I need suggestions for good home workouts that could grow bigger arms/biceps/forearms
I only know of push-ups.
A simple beginner routine could consist of
push-ups targeting the triceps, pecs, and anterior deltoid.
pull-ups targeting the lats, traps, posteriod deltoid, biceps, and teres major.
squats targeting the glutes, quads, hamstrings, adductor, hip ...