have question about adjusting the volumes between the instruments and the vocals

that should be a very easy thing to do if the instrumental music is already recorded strereo wave files and the the testimonies from the parents are already recorded.  that's what I gathered from your post, if that's not what the case is then you'll need to correct me.

do you have MC?  which version?

all you'd have to do is import the backing track, then import the testimonies on another track.  you could cut them up and move them around to your liking if you wish.  very simple project.

Right. There are volume controls for each track. Adjust the spoken parts so they are not clipping (the volume meter isn't going into the red too much) then bring the music volume up. Adjust with envelopes if desired.