how to get perfect reading score on sat

hello! i am taking my first sat in less than 2 months, on my psat i got a 1470.

Ive been doing the practice tests and recently been scoring in the low 1500s. my math score is usually really good but my reading is in the low 700s. i am wondering how to make quick improvement to bump my reading up, ideally getting 760 or above??

also random question: how accurate are the practice tests to your actual score? should i expect something much harder?