Earl, I fixed the volume problem for you using Audacity, which is a free, downloadable, multi-track recording program for PC computers.

After doing the volume repair, I noticed that there were some weird sounds in the background of the style you used, and additionally, a fair amount of 60 cycle hum, which is likely the result of poor grounding or a bad input cable. Hard to determine the source without being there.

Overall, not bad for an old codger, a bit pitchy in some spots, and it sounds as if you were singing near the top end of your vocal range. This can all be fixed with practice and timing problems will quickly be overcome when you get more comfortable with the recording process.

I did a bit of digging and found Audacity for other computer formats as well. Check out https://www.audacityteam.org/download/mac/

Attached is the volume corrected version of your song. Today I Started

Good luck,

Gary