Can help me on building OSMC on PC?

I want to build OSMC for pc as it is not avaiyfor pc yet.
But I can’t find any build Instructions anywhere.

Dotnet and C++ Dev

As you wrote there is no OSMC available for X86 so there are no easy build instructions to do so.
Generally the value of having OSMC on X86 is quite limited as you easily can install the OS (Debian) and the Mediacenter (Kodi) easily on X86. Most of the optimizations of OSMC are focused on the ARM platform or in general platforms with low resources which you normally don’t find in the X86 environment.