I am 18, I never had intercourse, my genitals are 4.3 inch

I am 18 years old who never do sex with any girls.My penis is only 4.3 inch long when it erects.I know that size doesn't matter and my penis is capable of making a girl satisfied.But i really worried about my sex life. One question is running in my mind what makes me more anxious that is my sex partner what will say to see my penis or what will she react to see it ? Is she accept me or reject me ? Or she will laugh at me?