Question, SAT

hello, PLEASE, answer my Question, I am currently In 10th grade In India, I wanna start learning about SATs and ACTs[ if u can add a course it will be really helpful as it is not affordable,:)))] I haven't studied anything right now yet the course gives tests some days in a week, how will I give them if I haven't studied? and also can you help how the everyday sessions will be?

I am really confused, please can someone give me a kick start on my prep!!

have a nice day, stay safe.