The organic approach is usually best and is more sustainable.
1. Build Your Narrative - which you convert into a sales funnel. a. what is your overall 'story' of how and what you address emotionally, functionally.
2. Build your target audience and engage with them in ways that they find easy to start with. e.g. free education, etc.
... Or you can try the fast approach and spend $10,000 per month on ad campaigns. :-)