Studying for the new SAT??

I’m a rising junior and will be taking the redesigned PSAT and SAT next year. (My school won’t offer the old one anymore, so I can’t choose between the two.) My question is, how should I go about studying for the new exam?

https://www.khanacademy.org/sat
Khan Academy partnered with Collegeboard specifically for the new SAT, so that should be somewhat accurate. Also, I heard that Ivy Global is one of the few companies that has released a decent prep book for the 2016 SAT.

Khanacademy - https://www.khanacademy.org/mission/sat/practice/reading-and-writing
You can also study old Sat styled questions too.
More information to know what’s on the test: https://www.collegeboard.org/delivering-opportunity/sat/redesign
I am a rising junior too and I honestly do not know how to prepare either but I hope KhanAcademy helps me and I am also just practicing writing because there’s an essay section?
This is a link to see sample questions from College Board : https://collegereadiness.collegeboard.org/sample-questions