I’m sure there are consultants here who can help you find a suitable niche. Sometimes it’s easier to hire a professional for research. You just need to pick the right person for the job
I can’t speak for design, but when it comes to building websites, most people don’t hire me because they can’t learn WordPress on their own. They hire me because I already have the knowledge and experience. They don’t have the time nor will to become developers, they want a working solution. They want to focus on their business while someone else takes care of the technical stuff.
If you’re stuck with market research then find a professional who does this for living and let them help you get started. You can probably find the right niche on your own, but is it worth spending hours, days or weeks on it.
Now, hiring a consultant will probably cost you as they need to spend time getting to know you first, but if you find someone good then it’s an investment that will be paid off at some point
There are a ton of talented people on this platform, but not all of them are successful. It’s mostly because they don’t know how to sell their service and they are afraid to take risks or too cheap to ask help from professionals. I’m not the best salesperson, but if Fiverr would allow multiple accounts I would definitely create an account for reselling.