chebe | Sailfish X, part 3

It's confirmed that you will have to use Windows, and Sony's tool Emma, to put Sailfish X on your Xperia X. (It's nice to see that Xperia X has been added to the flash tools list of supported devices.) So next step is installing that, and learning how to use it. Of course, you can try installing other ROMs now. You only have to wait for Sailfish X.