Beginner amp questions?

Okaaaaay, my family friend is gettin married, and she wants me to sing
for her first dance!!! and then me and my cousins to sing another
song. she's having me sing two songs. and then with the cousins, i
should say. i have to sing crazier, for their first dance, and mine
by taylor swift, (they r both taylor) and im helping her get ready
now, and she wants me to run through my two solos. the amp has this:
(in order)
input (i think thats for the mic cord?
level and it goes from 0-10
then a button that says bright
then low (*15, 12, 9, 6, 3 0, 3, 6, 9, 12, 15)
then high same ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

then its that same thing for another input

then a spot that just says phone and its like the input thingy
then the power. i can have it make noise (the mic) when i have it in
input, but its really really quiet. can u please help, what ne is my
volume?