Uworld advice

I’m a NON-US IMG currently preparing for step 1 and just recently started using Uworld, I wanna give it 3 months but I feel like I’m moving too slow or doing something incorrectly. I don’t know how to properly review a question, do I need to go back to the book? Do I need to memorize? I’m just reading and understanding and if there’s anything completely new or I feel it’s important I write it as a side note on the book. Please please share your experiences and advice, I don’t have that much time to prepare and I don’t even plan on finishing all of Uworld. Thank you in advance