Engineering as Marketing
Stop trying to find a marketing task you like and start engineering your growth.
As a builder, Engineering as Marketing is one of my favorite marketing channels. Popularized in the book Traction, these activities include building everything from simple calculators and embeddable widgets to generators and microsites.
When done well, they are backlink magnets and quickly establish trust because you're delivering value so quickly. The trick is to minimize the time to value and introducing the next logical step for the user (typically something included in your paid product offering).