I am doing training only for my sake, i.e., for general activity and slightly better body. I don't have any long term goals. I exercise twice a week in winters and once every two days in spring and summer.
I do dumbbell lateral raises with 5 kg dumbbells with 12x3 reps. Increasing from 5 to 6 kg is a 20% increase so it is not easy. Besides, I don't want to hurt myself. I am 33 years old and injuries don't heal just as fast.
So, how to increase weights when the starting weight is already too small? Shall I increase reps first and then increase it from 5 to 6 kg? Alternatively, shall I buy quarter kg weights so that I can make half a kg increments? Or, should I just suck it up and do sets of 6,5,5 with the same number of reps and then move to 6,6,5 and 6,6,6 when I feel more comfortable?
If it helps, I am male, 171 meters and 71 kg.