[magicloop]

I was also at the same juncture and found the 'The Personal MBA' Josh Kaufman book highly valuable. Because this book is an index book. Each couple of pages is the distilled top level wisdom/knowledge of a separate business domain. If that section takes your attention it provides a curated book list for digging in deeper.

So you just read the entire book for a wide-but-shallow understanding, and then drill in to topics that interest you most.

Getting into the business domain is firstly an issue of awareness. Once you have an awareness of the landscape you build your knowledge bit by bit.

For me it was obvious that sales was my weakest area, so I focussed on that with further reading and practice. (Turned out I was quite good at it in the end - a total shock to me as I am the nerdy techie type personality).