Its hard to provide actionable advice without knowing more about you. However, in general terms, you focus on developing and audience through a marketing plan that has a clear content strategy.

Your marketing plan might simply be:

Produce content in various formats for $market. Put call to action on content to urge $market to buy/subscribe/whatever. Then post the content in $community.

The content strategy might be something like:

I will focus on $subject. Will produce blog posts, vlogs, podcasts, whatever. The main subject revolves around it. I will do this three times a week for twelve weeks and measure which content got the most attention.

Its hard to say $advice will work for you because there are many variables. Feel free to ping me (email on profile) if you have more questions.