English major here, and your post is great. It's not complete, of course, but you've hit everything a beginner needs to know to get over the first hump of understanding, in a way that "expert" knowledge sometimes gets in the way of communicating. I doubt the reply I was writing in my head would have been better, and probably would have been worse, so thank you for jumping in.

But (because I have to go there - and I promise getting to this paragraph wasn't the point of the compliments above), Much Ado isn't entirely in verse: the clowns - lower class, all of them (Dogberry, et al) - speak in prose. So, the next layer of the onion, for anyone who wants to pick at it, is noticing in what circumstances writers use different registers, and why. Austin does the same thing: Mr Collins speaks in flat, prosy sentences, except (if I recall correctly) when he talks about his patron, Lady Catherine de Bourgh. I think that has a subconscious effect, even on people who couldn't name an iamb, but once you pick up on it, it's one of those "ooh!" sorts of moments where you get a glimpse behind the authorial curtain.