@robi I have had the same experience, discovering a message that was sent to me months before.
I had not thought about using a PTT service. I think the one that shows the most promise with a quick glance is the discord sandbox, as discord allows people to communicate via text and also send files. But then there is the issue that is it active for some ( the tech savy) but passive for the people who are not.
Thanks for the info. I am going to look into it deeper.
@atrilahiji I have seen elsewhere in the forum, that you are knowledgeable about Moodle. Do you think what I am thinking is possible even if a little crazy?