The most important thing is to answer questions... I did it in my free time constantly. I was on a break at work, off from work, on the bus... if at any point I wasn’t doing something, I would answer questions. UWorld was all I used and an app on my phone. Do not get discouraged by getting questions wrong if you’re using uworld or any other question bank. Uworld was great because their rationales were great. Read the explanations about why the correct answer is the correct answer so you can understand how the NCLEX wants you to think about their questions.
Test day... try not to panic. I had a literal breakdown on question 20 because it was a simple math question I had answered millions of times before and got right and I just couldn’t get a sensible answer. I sat there for 10min on that question and didn’t let myself move on until I was done freaking out because I knew if I was panicking like that, not only would I have gotten that question wrong, but every other one after that too. If you need to take a few minutes to breathe, do that. Do not freak out and rush through them just to finish. I landed on the right answer (i think lol), got some confidence back, and passed in 75.
Good luck, friend!