[csa]

> We're hoping to add a few shows/ podcasts to our regime this summer to get our ears more accustomed.

Try to focus on shows/podcasts that target children and/or teens -- the language will be more at your level. There may be more slang, but that will be relatively simple to navigate via various language forums.

Once your ear gets tuned to listening to native-speed German, then you can move on to more adult-oriented topics (start with simple, fun stuff and then move on to material that covers "real" topics).