So you’re overlapping BPa and the camera is in BPb?
Setup BPa like this
and in the level ( after putting BPb in )
I think everyone starts with a bare camera in the level, but it’s nowhere near as useful as an actor with the camera in 
I’m not getting this, what do I do afterwards?? How does this even work??? Why can’t I find any of the nodes I need?
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This gives you what you were asking for. You overlap BPa, and you then have a reference to BPb, which has the puzzle in.
What are you missing? You have a reference to the second actor, and you use view target or possess.
Hmm, here, I’ll show my process with what I’m doing.
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The ‘set view target with blend’ node is made by dragging from the player controller
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Ah! Thank you so much!! I finally got it to work and the puzzle working too!!
I’m still trying to learn the differences between references, instances, and the difference between getting actors vs. casting to them (and also blueprint interfaces), But this helped me understand it a bit more! I’m glad that now I know a bit more about how to switch cameras and stuff.
Seriously, thank you very much! Since this thread has gotten a little long and my initial question was a bit broad, I’ll go ahead and mark the solution here. But I’ll definitely look at the other resources you provided and will ask additional questions on this forum when needed. 
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Great 
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