SAT helpppppppppp???????????

so i'm just about to go into 11th grade.... should i take the SAT in march next year would that be enough time to study???????? and let me have a chance again if i do bad?? should i take the psat again if i already took it in 10th grade??? and also what's the best way to study for the SAT and probably ACT tips would be really helpful...sorry i know i have a lot of questions...thanks