Spirit Fingers

What do you do if you're going on 18, totally awkward and lacking in self- confidence? You could just sit in your room all day and all night and study and wonder why you never get asked out…OR, if you’re Amy Song you could join up with the Spirit Fingers – the strangest, hippest, coolest (yet most welcoming) art club ever. But as Amy is about to learn, discovering your TRUE colors is about more than just painting.
Also, I'm really confused if this is really a novel. I know of it as a webtoon and never heard of it as a novel before. A quick search on google showed me weird looking results on Goodreads that make me think someone added an entry there just to keep track of their readings, instead of it being an actual published story.