First Guitar Attempt

Today was my first attempt to play the guitar and sing together. I downloaded the song to sing at church exactly 9 days ago and taught myself then had my guitar teacher correct any issues I had. My voice teacher and also a friend gave me some pointers. I practiced a lot and then today no mike at set up. I turned the amp and the guitar down to 1 and tried to sing out. Those sitting close I think could hear me but those in the back could not hear at all. Lesson learned always have a mike when playing a guitar with a bass or else your singing will not be heard.