Anyone had a baby young and had everything turn out okay?

I'm 19 and pregnant with my first and everyone is telling me that I've messed up and it won't be okay. I still live at home with my mother, thankfully she's supportive. I plan on moving out after I adjust to motherhood. I've also found a college program for young mother's so I'm going to that to get some qualifications. My boyfriend is supportive as well. It seems to be all okay but I'm so scared. I can't make any mistakes for the sake of my child's future.