I am so effing proud of myself.
Some of the edges are rough, the cover fabric fits weird and the spine is too thick for the body of pages,... but I'm just happy that I could actually do it.
After dedicated study of numerous online book-making tutorials, I have bound my own sketchbook! It's full of water-color paper, so once I actually use it when it's finished it'll be a completely customized, one of a kind art book!
And I am happy. Now, what to paint?...