I truly believe that building a personal brand has to do 2 core things.
Distributing content around a topic that you're passionate about, and disproportionately caring for the audience that you're looking to reach.
Too often I see people selfishly creating content and they wonder why they aren't breaking through the 'glass ceiling'.
Once you begin from a place of empathy for the audience and passion around your content, if you're good, you'll break through!