Always focus on the hard part and pull easy part with it, that what I would like to advise you if you have massive resources like money and time it's advisable to try " try and error method " if not you must get data of your business and go with data drove decision. I have created a blog for the same, you can refer it for more details.
https://techwink.net/blog/how-to-solve-chicken-and-egg-problem/