Looking for book/tutorial to jump to N8

I hope someone can direct me to something put together that teaches Nuendo 5, then difference with N6, N7, N8. An overview so I can bravely move slowly upward. I’ve watched the version trailers and just seemed too overwhelmed in those short presentations. I wish there were an online course I could better learn from.

Wow, I see my number of previous post disappeared from years ago, makes me a new-newbie!

Any and all help would be much appreciated!