For an absolute starter, mod tutorials might be a bit too advanced.
When people get here they're still at the point of "what happens if I click here?".
From the bad steam reviews I assume they can't figure out how the joints even work together in the most basic of ways, and quit before they get past that.

I think that something that in a very concise and objective manner explained to them how things like "chest+pecs+shoulders" or "hips+legs+knees" work, might ease up the initial overwhelming feeling a tad.

At least they would be able to flail an arm or a move a leg which are stuff used through all the gameplay.