I was in a similar spot when my college radio show suddenly pulled in real sponsors and we had zero clue how to package ourselves. What helped first was wrapping our heads around building the right kind of team, and this write-up
https://www.maticdigital.com/insights/talent-fluidity-why-business-needs-team-pairing-in-2024 gave us that framework. After that, finding a digital agency to handle branding and audience growth felt way less overwhelming.