If you’re doing a digital sketch I honestly wouldn’t be that concerned. Like I said, here in the US the best case they get is a “cease and desist” where you can then change the tagline to “Mockulus a FaceSpace company”, or just leave the brand off it and focus on the sketch. A nice sketch will work fine regardless of if it has a big O and an Oculus logo. If you keep their trademarked logo off it no one can sue you over using an oval shape.