Watch the Perestroika online guitar lesson by Stephen Bennett from Harp Guitar Basics
Remember to really keep your thumb braced back behind the neck so you have a chance at making those necessary stretches work.
An aside here: I'm using the words "verse" and "chorus" throughout because that's just what I do. One has to refer to the different sections of a tune somehow. I could call one part the A section or B section perhaps - and sometimes I do when talking with other musicians. That sometimes can be confusing though because those could also refer to keys. Verse and chorus would more logically apply to "songs" - music with words.