Watch the Perestroika online guitar lesson by Stephen Bennett from Harp Guitar Basics
And then you gotta get this part.
You might take a moment and look at 1:07 before getting into this section. Get those descending chord shapes in your fingers a bit before digging into the right hand work.
Once you can make the shapes, go to 1:16 and it's just a matter of applying the hammer-on to each.