99% of all new venture ideas tend to just not be VC fundable because the market size isn't big enough and growth rates achievable aren't high enough.
I'd start with doing a market sizing on the opportunity, and the addressable portion of it. Then try to figure out what your business model is going to look like.
Once you are done with the above (even if they are rough calculations and you only have hypotheses about your business model), the answer of whether the venture could be fundable or better bootstrapped might be apparent to you.
Happy to discuss this further with you, if you'd like to.