How do I make my personal brand sharp and consistent?

You have a position already, which puts you ahead of most. The trouble is the gap between what you mean and what others actually see across all the places you show up. Blurriness is not a lack of substance. It is a lack of repetition. Sharpness comes from subtraction, not addition. Pick the one thing you want to be known for and let the rest fall to the background. People remember a single clear note far longer than a full chord. Say the same true thing in more places, more often, and it becomes what you are known for. Write one sentence that captures your position. Then read your profile, your bio, and your last few posts, and cut anything that muddies it. Consistency is mostly the courage to repeat yourself.