CK advice, IMG what resources to use and how long to study?

Hey guys, so I am an IMG. Recently finished Step 1. And CS. Step 1 was in 230's. I hoping to score over 250 on CK. I am assuming that if I take an nbme today I will probably score 0. What resources should I absolutely use, and how long would it take me to get to that score. Hoping to apply for the match this year. Thank you.
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Source Type: forums