Hi everyone, I thought to share my story here maybe it will help someone

Hi everyone, I thought to share my story here maybe it will help someone. I never sat for IELTS or OET before. I started preparing for OET in July for August. It was all good when my first result came i was given “B” in Listening, Reading and speaking but “C” in writing. I immediately went for rechecking as i was sure about my writing skills. And yesterday my grade was changed from “C” to B. My point here is if you are confident dont hesitate to challenge the authorities.
I now request senior fellows here to guide me how to start preparing for PLAB 1 test. Which material to look for and where can i get it? Swamy PLAB 1 long course is it a good idea? I appreciate your help!