Sounds like an excellent setup! Yes, with different folks at the other end, each has a different challenge, connection, hardware, etc. You definitely want to make it as frictionless as possible for the student.Good morning,
I use Zoom, Facetime, Duo, Skype and WhatsApp.
Of all, Zoom had the least problems in maintaining a stable and reliable connection. I can tell because I switched from Hangouts to Duo to Zoom with one of my students (with a not so great connection).
It's easy to manage, I even can record myself with my DAW and my student can watch/listen via sharing my desktop.
I'm saying this well aware of all the things that have been found out about Zoom lately.
One important thing:
You can use Zoom as the host and the participants don't have to use Zoom at all, they don't have to install anything or subscribe.
I'm using two mics, one for speaking, and one für sax. When I'm teaching clarinet, I'm also using the voice mic as a second mic (gooseneck).
The mics are going into a UA interface, so I even can put a compressor on my voice and some reverb on the instrument. You can disable automatic gain control in Zoom.
Back in the day, this used to work fine. Depending on how recent your Mac is, that may vary.how to share the sound from other apps