Am i too young?

I am currently 11 weeks pregnant. I am 18 years old and I’m terrified. I never had the best mom growing up, what if I don’t turn out to be a good mom either. I’m scared to be a mom but I’m also excited. How do you be a good mom? How do i guide my child when I have nothing to base it off of? I wasn’t guided, will that factor effect my ability to be a good mom? Can someone help me please. I need someone. I need advice.