Whatever the task needs.

New paradigm? Probably a book first approach.
Library/API: their own suggested tutorials and references cause that shit moves quick.

If I have to read a cave painting to understand an ancient card punch language I’ll happily do it.

I’ve found, when I don’t know something yet I get the “brick wall” feeling, that this is all going to be too difficult... I’ve learned to love that feeling.

If all else fails: RTFM.