The advice to "build an audience first" is not wrong exactly, it's just usually deployed as a reason to wait. It puts a vague, multi-year prerequisite in front of a piece of work you could start this week, and it does it in a way that sounds responsible.
What an audience actually gives you
- Distribution — people who see the thing when you publish it.
- Feedback — reactions before you commit months to the wrong course.
- Proof — the sense that other people already find you worth listening to.
Those are real. Notice, though, that a first course gives you the second and third almost immediately, and that the first one can be borrowed from relationships you already have.
What building the course first gives you
A course forces a decision an audience lets you avoid: what, exactly, do you help people do? Coaches with big audiences and no offer are common, and their problem is harder to fix than yours. Building the thing first means every piece of content you write afterwards has somewhere to point.
It also gives you the only feedback that counts. Nobody's opinion of your course idea is worth much until they have tried to follow it.
The ten-person version
Instead of an audience, get ten people. Not subscribers — people:
- Past clients who got a result from working with you.
- Anyone who asked you a question about this exact topic in the last year.
- Colleagues who do what your students do.
- The two or three people who have already said "you should make a course about this".
Message them individually. Not a broadcast — an actual message that says what you've built, why you thought of them, and that you want their honest reaction. Ten of those beats a thousand-person list you have never emailed.
Ten students is enough to find every real problem in a course. Beyond that you mostly hear the same three pieces of feedback louder, which is a good reason to launch small on purpose rather than out of necessity.