P/F Step 1 as a Mid to Low-Tier Student

Hey guys, I am not the smartest student and do feel like at the bottom at my school. A lot of my effort goes into passing my school block exams and barely have time to do Anki. During MS1 I was barely getting by; MS2 is a bit better. I don’t remember anything as a MS1 and am not sure how to get started for Step Prep on top of school. Any recs and study schedules to follow? I was planning on prepping starting in March. Our school gives us the beginning of April for Step prep and I plan to take my exam April 25. Should I extend the date of my exam?