Need help getting prego.

Michaela • My boyfriend and I have been together for a year now. We are working on baby #1. My name is Michaela and I am 19.
Hii, name is Michaela. 
My boyfriend and I been trying to have a baby since March. But nothing has happened? Maybe I'm not doing something right ? My friend is telling me to take some
Sort of Vitamens to take before and during pregnancy, which is good  but do you have any advice or tips you can give me ? This will be my first child.