CrazyScott
You don't need to rush. There is a month left on the pass, and you'll get about three characters if you only unlock stuff via the pity system. But I agree that the claw machine needs improvement/more information.
I recommend waiting to spend Nemo bucks until after you've used all the spare scrap, and waiting on using the scrap for at least a week or two to see if the devs do anything to make the machine easier.