Advice for the N2?

Hey! I'm taking the N2 in los angeles this December, but it'll be my first time taking an exam so I've been a little worried about how it actually works. I know that the audio portion happens in one go, and you get no breaks. Other than that, I don't have any idea what the testing environment is like. I'm assuming it's a room with several dozen other test takers?

I'm also a bit worried about the 文字・語彙 portion of the exam. I'm not at all worried about the reading, grammar, and listening portion of the test, but out of the 32 total kanji/vocab questions for the sample N2 test available on the JLPT website I was only able to get 15 correct. I've heard that the minimum passing score necessary for each section of the test is 19 points, which means I'll end up failing the test if I don't get that up (yikes!). Any advice for studying that section specifically would be greatly appreciated!

by Expert-Estate6248