Thx for your answers, I always try to do a WBTB, and I know it feels different, but at the same time I can't wake up after 3/4/5 or 6 hours of sleep and then go back, if there is a longer break, but if it's too short I can't do anything, because I will fall asleep in seconds.

The best feeling for a Wild is for me 3 hours before going to bed, but I know it doesn't work. I often tried little naps at day, after school, but I don't have the time anymore, because I have to learn... and even if I try it at weekends I won't be tired enough. I see, seems to be bad luck for me