As I mentioned to Mao Yang just now, drawings of sections for tomorrow's pin up cannot be presented with your building standing alone in isolation. Your section has to cut across the streets or spaces to the adjacent buildings. The idea is to show scale and sight lines, how your building relates not only internally but to the existing context. Some outline elevations on your sections would help, so would some human figures, maybe vehicles, too.
You'd need at least 2 sections to illustrate your scheme.