3 birds with one mandatory stone would be grate for all 3 of those.
It would work extremely cohesively as well in such a simple and effective way.
Break vent = this is something i can and now know how to do going forward
Crouch in to vent = this is something i can and know how to do going forward now
Med kit in vent = i want to explore vents in the future
You could also throw in the flash light teachings and make the vent dark as well and none of it would be to much as they all sync up to useful actions simultaneously, and even on repeat play, there is no real stopping, you could easy just break the vent rush through in seconds on a second run. but that small little trio set piece would go along way to seal some of the more basic actions you want the player to know in the later levels and episodes.