At the risk of sounding too negative. I will be the devil's advocate here...

Can an introvert turn himself into an extrovert? Can a naturally shy person become an ace salesman?

You know yourself pretty good, so you would know as good as us. Can you get out there and hustle? Maybe even do cold calls?

It's one thing to give investment advice when times are up, it's another thing to do it when times are down.

Myself, as somewhat of an introvert, I must admit to being somewhat skeptical. At best these things can take time. For myself, starting out on a career by taking a job that would go against my natural grain, especially during economic down times, sounds like a recipe for stress.

Sounds like commision work. Is there a base salary?

p.s. you will need to really believe in what you are doing, IMO