Yeah! We're not alone mate... even though sometimes world tell us so. There will be always others to resonate with, even though it may be difficult to cross paths with them.
Don't feel childish, all stories, animations, videogames, art we cherish and inspire us are made by mature adults who work hard to develop skills in art and other disciplines through diligence, intelligence and by studying and observing. That and imagination, creativity and admiration for the simple things is something that imo makes us humble and always more in tune with nature and life itself XD.
RE: Sketch of Vietnamese girls and mechs