Am I understanding this right?

I am going to begin my first grow in a few weeks as I'm waiting for stuff to arrive. I've been taking these notes like a college student on the stuff that seems above my head. This is my best understanding of what PAR, PPF, and PPFD are and how they work. If someone would be willing to look at this and let me know what I might be misunderstanding, it would be appreciated. Also any related advice would be appreciated.

I'm doing DWC in a 3x3 tent with an Ionboard s33.