Your first customers often come from your existing circle. Don't be afraid to tell everyone what you're doing.
At a minimum, you need a clean website and one active social media channel where your audience lives.
This is like a Social Security Number for your business, required for taxes and hiring.
If you'd like to dive deeper into a specific area, let me know: What are you looking to enter?
More businesses fail because they run out of cash than because they lack talent.