@gonsolo, sorry, I cannot provide the downloads from swift.org; There are nightlies that are available on Azure. I welcome patches to improve the instructions.
https://dev.azure.com/compnerd/windows-swift is the main page and will give you a quick link to where to go.
If you click on the status for the Windows Toolchain (x64 (VS2019)), it should take you to the last build, which has the “artifacts” (click on 1 published). If you select the artifact name, there will be a download button on the right.
Similarly on the Windows SDK, you should be able to download the last build. That should have all the pieces that you need (compiler, runtime/standard library, libdispatch, Foundation).
swift-package-manager is a long way away given that it is not particularly portable code. There is work going on to enable that, but, even the llbuild build is currently broken on Windows :-(.