Trying to Understand Season 7 Rules

Hey guys, I am brand new to this game. I have Free Folk and Targaryen starter sets. I am looking at the documents on the official website and already printed the Season 7 'current cards' for both factions. I went to the 'Rulebook & Game Mode' section and saw there is Season 6 Rulebook to print off but no Season 7 Rulebook.

My question is this

One: Is the rulebook that came with my two sets no longer useable?

Two: should I print the Season 6 Rulebook now or wait until there is a Season 7 rulebook?

Three: What other documents do I need to print out?

Four: What should I keep from the Starter Sets (obviously excluding the models)

Thank you!