Singing types: how low can I go. (the value of voice lessons on range)

I have never been known as a “good singer” but today I was trying to put some vocals on a track out of desperation and I decided to bring up a spectrum analyzer to see what my natural voice range is.

To my surprise it is C#1-C3 or lower than even lower than a “typical” Oktavist which tends to be E1-E3.

My voice actually sounds pretty good in my natural range, despite it’s limited practical use. My question is, if I took actual lessons what is the chance I could make it to G0 and Basso profondo bragging rights range?

thank you in advance.