Help??

Hughes • mommy of 4
I'm 16 an I'm pregnant I'm 17weeks today an I'm scared I'm not going to me a good mother. Me an my fiancé has pretty much raised my sisters kid abgail from 2weeks old until 1years old she is 2 years old now. She now live my sister (her mother ) an she still calls me mom I just feel it's gonna be different because this on is actually my kid. Any tips? Oh an any tips on labor too? Labor scares me I was in the delivery room when my niece was born.😧
(Please don't be rude)