Basically self taught although I had some very basic guidance aged about 9 or 10 while at schoool. later I worked in the same building as a top advertising photographer. Aged about 19-20 I went on a college coarse but knew more that the tutor about developing & printing, I had been teaching basic photography while at school aged 16 after being approached by the teashing staff.
My bibles in my teens where Kurt Jacobson's Developing, and also Enlarging, and they still remain the best books of their type today.
For my sins I do have an MA (Masters Degree) in Photography, so taht's a formal qualification but based on my art rather thantechnical background.