My cat got hurt and idk what to do!?

Hi im scared for my cat. Her name is Kiki and she is a outdoor cat i have her for a few months and this never happened before but she has a big wound on her leg idk what that part is. The wound is not bleeding but its still new i think, its circular and its pretty deep she keeps licking it. My dad said that it will heal and we don't need to go to the vet but what if it gets infected! Im so scared guys please help me (⁠╥⁠﹏⁠╥⁠)