The NOF may be used entirely as packages from the NuGet public gallery - there is no need to clone this repository. Indeed, building the framework from source code is quite complex and not recommended for newcomers.
The best way to explore NOF 10 initially is to download the Template project from here:
and follow instructions at the start of the NOF 10 Development Manual, downloaded from here:
NOF 9 Template project:
NOF 9 Development Manual: