Experience with Turnitin

so i completely ignored my summer work and i’m doing it last minute. I was going to genuinely try and read the books within the course of two days but that seems impossible. anyways i’m going to try and use sites like sparknotes and stuff. if i rephrase my sentences and add new ideas, will it detect plagiarism? i’ve never had a teacher use turnitin before so idk really know how it works but it’s freaking me out a bit.