Advice

I am a grad student-athlete hoping to get into law school (this year or the next depending on my November LSAT score). I took a practice test (timed with realistic conditions), and it was literally the hardest test I've ever taken in my life. I'm a smart student with a 4.0 for both my undergrad and grad degrees. I have no prep whatsoever in regard to the LSAT. Everything is really overwhelming for me right now, so any advice or guidance on where to even start would be greatly appreciated.