first launch tutorial
Teams introduces a lot of new concepts and features, especially for "non-millennials" but even for "millennials".
There should be a quick, interactive tutorial on first launch that calls out how this app works. For instance, what is a Team, what is a channel, what do @channel and @person conversations do/alert, what do favorites mean, use the add content to tabs for easy access, etc.
As a whole department, it collectively took us a while to figure it out (and still haven't figured out everything). Why not give us a quick, 30-60 second rundown of this very new concept of Teams so we can use it effectively from day one?