Looks great; very substantive. Do you think I'd survive if I haven't done any express, node or mongo before? (I'm willing to give it a shot, but not sure if it would be sensible because I could get stuck and spend time on issues unrelated to docker).
You're right, but this tutorial is using some very basic node and express stuff, really just a few lines of code. If you think that the node stuff in the first few minutes in this tutorial is overwhelming, then probably it is not quite suitable for you, but if you fell like you're comfortable with the first few minutes, then you're good to go, the node and express stuff in latter part of the video couldn't get any harder.
Disclaimer: I do know node and express when I was following this tutorial.
Also, the slides at the self-paced tutorial section might be helpful to you.(https://container.training/)