I am hoping to have a simple (to use) podcast where I can record pieces of lessons that are problematic and potentially have student guests for Q/A. Is there a domain app/plugin that is simple to use? What are you using?
As often it goes, the answer starts with “it depends…” There are services/apps that let you record and publish quick and easy, e,g, http://anchor.fm and http://podbean.com (disclaimer, have never used). The downside is some limits on storage, and also relying on a company to keep your content alive.
If you have a means to record your audio, and save as MP3 (e.g. use the Open Source Audacity software), you can upload audio to your wordpress site (like audio), and create each episode as a post. If you put them into a category, then the RSS Feed for thar category becomes your RSS Feed.
There are wordpress plugins to help you set things up to, e.g. Seriously Simple Podcasting: Top Rated WordPress Plugin for Podcasting (20,000+ downloads) - Castos
Another option is to maybe contact Terry Greene and ask how to get a show in the service he uses, VoicEd.ca https://voiced.ca/
There are many routes…