How to handle 3d print as a beginner

Recently i have been working on the website Davinci which is a 3D print provider. After some research on the visitors on the website, we've learned that the visitors click away from the site, when they need to select the requirements, print material, printer etc.- I was therefor hoping i could get som inside knowledge on, what amount of knowledge an experienced, moderate and beginning users of 3D printing has?- I was also hoping to understand what i need to know as a private person before placing an order of 3D prints?