Many people hate the idea of promoting themselves. It smells of "sales" and we all hate those sales people that knock on our door or call us on the phone.
Yet we have to promote ourselves at some time -- even if we have a job, we might be aiming for a promotion.
I have done a reframe exercise for myself. When I knock on the doors of organizations, 'll just ask, "what one small thing could I do that would have the biggest impact for you?"
Its the 20/80 principle -- 20% of what you do creates 80% of the result. It just takes identifying the 20%.
I'll bet they may have some good ideas.