I see you’ve already ordered the laptop. I have no experience with the Nimo brand, but since you’ve ordered it from Amazon (and they have a great return policy), I’ll just say to make sure that every single port/button/switch/function works…because once the return window is closed if something goes wrong, good luck getting parts for it.
This is why I’ve always stuck with Asus and Lenovo/IBM for laptops. Replacement parts everywhere!
For OS choice, we had a long discussion about it here. Different target audience though. Which OS for an absolute noob?