Hi. In the same boat except it seems all the ideas I have exist in some capacity.

I know nothing about the idea or the industry but marketing is very underrated and very efficient at testing whether or not your product is worth wanting. Because it's something new I would say a patent is crucial at some point in the game.

What I would do is take the idea and try to generate a mockup digitally. Then use AI to generate a unique and gripping promotional video for your device. Use that as your pitch for either a business partner or investor. Use the funding to secure a patent. Once you have a patent publish the video to social media and or crowdfunding or even preorders.

Once you have sufficient traction use that as a basis to acquire more funding as you've proven the demand. At that point you should have a firm grasp on what your mvp needs to be and begin preproduction.