I'd recommend a Sakura Gelly Roll pen in white, or Copic Opaque White, for removing mistakes :) just because we work on paper doesn't mean we can't fix errors.

The Gelly roll pens are really cheap and can be bought on Amazon or in most art stores, the Copic paint is on their website and possibly Amazon as well. It's a bit more than the pen, but it covers larger areas.

Either way this looks great :)

Well thing is i dont live in the US, so this product probably wont be sold here. And the copic white i was thinking of buying. ... when i have the money to do so, along with all the markers that i dream of getting

I don't live in the U.S. Either :) you can most likely find it online like I did.
I hope you get your dream markers!

Oh i see. Since it is a product that i dont think exists here i imagine i would have to import it. Hm... ok then.

Possibly so! But it originates from Japan so I assume its global. The shipping shouldn't be too much since it's a small item :)