Suggest Solution For Penis Problem

I am 24yrs old and 5ft 9inch tall with a semi athletic physique. My penis size is 5-6inch(erection). Many men have their foreskin detached right in the childhood. But i have it attached, it seems to be attached to a certain point just below the head of the penis on the lower side of penis. ( i once had a encounter when i was having intercourse & during that my foreskin tore off partially from that point followed by bleeding, which eventually healed So i want to know 1)if my penis size is ok ?2)is it safe & possible to detach the my foreskin anyway ? If possible then please tell me how can i do it ?3) is there any possiblity that my penis size will grow if the foreskin get detached ?