At the moment you can't, i'm developing it as a private project for now (i'm only posting updates in a discord server). This is because i had to manually convert models and textures in advance and store them in the project files, so offering the game as a download would be a copyright violation similar to piracy.
Of course eventually we want to have tools like DFUnity does, that let users convert their own files locally, but thats still a long way to go.
Then, unlike DF, Redguard is still a commercial game on stores like GOG, so we're not quite sure yet if Bethesda would allow this kind of total conversion project at all (I recall that they shut down an Oblivion mod for that reason).