I ... really..? What sort of stuff are you wanting out of Blender? If it's 3d printing, you probably literally just need to do the soda can or donut tutorial - not even the whole donut tutorial.

Like, I have to imagine that 80% of the "quick stuff" people need to do in Blender would be done with:

* create quad * exude like 5 times * done

Maaaybe

* perform boolean operation between object and a circle or 3

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Like, I have less than 200 hours in Blender and I was pretty functional after like ... 30 minutes to an hour of a single tutorial.