Good SAT resources for self-preparation:
oneprep.xyz (massive question bank); make sure to use Princeton Review practice questions first
Digitalsat.ai (start with diagnostic tests, then do vocab, then RW 700-800, then the free mock test)
www.vocabtest.com (play around with it but don’t feel like you need to memorize every single word)
https://membean.com/roots (use to whatever extent you want)
https://internationaltester.com/2021/01/26/sat-reading-practice-articles/ (twelve sets of SAT reading materials with word lists and questions, with the answers—hit “start reading in your browser” to access the free version)