Where do millennial and gen z artists hangout? What are their burning pains and aspirations? What language do they use? Do you truly understand what they really want?

My perspective is that creating solutions to your target market's burning problems will increase your chances of success as a business. Your business having the same values as your target market is fantastic, but it won't mean much if you're not delivering what they're willing to pay for.

I hope I understood your question correctly.

Agree with Kenneth that this is a crowded place. My suggestion would be to niche it down and focus on the supplier side accordingly. It could be based on:
- type of supplier (rental car agencies, seniors, married people looking to give-up their "fun" car for a kid-friendly car, etc.)
- type of car (could be brand, model, year, and/or category specific)
- serving geography (could be from a specific set of locations)
- and more

Hope this helps!