Hi Renz Rudolf Landicho! Great exercise, you are doing there! When I looked at your studies, I noticed a lot of inconsistencies that indicate you are studying the shapes and contures of the skull instead of forms. This seems to be more or less the same thing at first sight, but it is not. Shapes and lines changes drastically when the object or the viewer moves even slightly. If you want to understand the skull and not just "a viewpoint"/symbol, you need to focus on the volumetric forms within and around the skull and where they intersect. This will help you with the landmarks and the perspective as well as with reconstructing the skull in angles you imagined. Have a nice day and keep up the work :)
I agree with what Mengu Gungor and Izak van Langevelde said about the focal area and I think I would go even more dramatic. You have a great robot design and a really cool story, if you add more darkness on the surroundings, you will not only draw the focus closer to the protagonists, you will also create a very nice experience for the viewers as they discover all the elements in the dark and the story unfolds. This is a really fast edit, but I think, it brings the mood across.