Mobile development

I need to prototype a user interaction model and have it built on Xamarin where it can later be turned into a fully functional app. The initial requirements are: 1) Setup a Xamarin project with instructions that will enable others to join and extend the project. The project must use my github as a repository. 2) Build a proof of concept prototype that demonstrates an interaction model where a scrollable menu (not the app global menu) can be scrolled through horizontally to present "categories" and when a category is selected allows the user to then scroll through items in the category 3) When an item in the category is selected the item will make it easy to go back up a level, also to go select a new category and within the item allows for presentation of a title, description, icon as well as three action buttons (they don't need to work at this point) The proof point is how well we can make this interaction model intuitive while supporting: - easy access to categorized items - take advantage of infinite scrolling and make it fairly easy to access categorized items - maintain context so the user can get in and out of items easily without losing context - do this all without taking up the entire screen real estateThe prototype needs to work on Android 8