This is great -- it's fun and pleasing to look at. Well done! For me, the most interesting parts are the thick layering of blue to create that impasto effect, and the octopus's arms breaking out of the bounds of the canvas onto the blank void. I like where you're pushing up against the boundaries of how you're conventionally supposed to paint, would love to see more of that if you do this again.
Questions: Why did you Google search before starting this? And do you have any favorite artists / cartoonists / painting styles?
Yes! And the shading looks very clean too.
I'd be curious to see what the very rough sketch looks like. Painting from your memory might feel vulnerable but yields much more interesting results in the end -- Georgia O'Keeffe didn't need her flowers to look perfect, she just painted how she felt they looked, and that made them all the more beautiful. I hope you keep developing your style, without fear of being wrong.