Age: 26

BF: ~23%

I've been working out for some years but I never really reach my aims. When I bulked I started to become too fat and when I cutted I started to become too skinny. My BF% was always around 18%-22%. Recently I discovered and understand that I'm skinny-fat (as you can see by the pictures) and that it was impeding me to reach my aims. I want to change this and I decided to cut before bulking.

The problem is that I don't know until which BF% I need to cut before bulking. Some people say that we should start bulking around 10%-12% and stop around 15% but I'm not sure about that. My BF% is around 23% now and my waist is terrible! Around 87cm (34.25")

1 - Until which BF% should I cut?

2 - After cutting I want to start a clean bulking. What is the acceptable amount of fat I can gain? I am afraid of bulking and becoming too fat.