You know I love Peter Bowerman’s approach to both corporate writing (aka copy writing, commercial writing, etc.) and self-publishing. I recommend both The Well-Fed Writer and The Well-Fed Self-Publisher.
Peter offers both individual coaching and group coaching to help people launch their corporate writing career. He limits the group to 12 so you’ll get the attention you deserve.
I haven’t taken this class, but if I wanted to get into anything close to corporate writing I would. Peter’s approach simply makes sense to me. If you’ve got any interest, take a look.