Any programmer turned marketer here?

As a programmer, Will you choose to market your product yourself or outsource it?
I believe every programmer must learn a bit of marketing. You build great stuff but you must know to sell it as well..

I learned this lesson the hard way, I never considered myself a marketing guy and frankly I am very reticent about it. Launched a couple of products (https://indiehacks.site/ and https://dictozo.com/) but I must overcome this fear of not marketing actively and still trying.
Anyone here who became a successful marketer out of a shy programmer? Please share your journey