Trust me, I've been there.
I started with my other company, Tone Vault Audio & Media. I learned where to start. How to form a business. Taxes. Laws. Multiple businesses. Websites & SEO. Funnels & email drip campaigns. Courses. E-comm. Online marketing, and the start of it all, which was an actual brick & mortar service rebuilt 3 times... 3rd time's the charm I guess.
I've seen almost every corner of modern business tying to the internet — and almost every corner of the internet itself.
Figuring out what you're good at, what you're going to sell and how to market yourself isn't the hard part.
It's once you're up and running — and need quality clients coming into your business — and how to get them to buy at the momentum you need to scale — that's the difference between a hobbyist & a legitimate business person.