I've been working in AutoCAD and Revit for the past couple years now in architecture, and there's a lot of search for knowledgable Revit users (outside and inside of the program)
Regarding getting employment opportunities, as said above, there's small barriers to get into the field so lots of competition, but lots of positions too. Not much for pay tho.
I would imagine the programs in a programming field (modelling) or automotive industry to be a relatively different outlook. Learning programs is cool, lots of free tools online if you're willing to look and teach yourself.
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