is it normal to masturbate at such a young age

Well I discovered porn at about 6, but i only started to wank at around 11 yrs old. I still remember, that when i used to watch porn when i was young (~6-7), my penis used to hurt a lot. I"m a late bloomer (puberty) and i don't know if what i did affects the normal growth of my body.

Nope you are not a pervert. Sorry that you feel that way. Masturbation is perfectly normal. Perfectly healthy too with no adverse consequences.
Many girls claim that their cramping during periods are relieved if they masturbate and achieve an orgasm. So it is perfectly healthy and therapeutic. Enjoy the fun and those lovely sexual sensations. Done feel guilty or embarrassed that you masturbate. EVERYONE does it even if they are not aware they are doing it.