By constructing their opening film sequence, the author learned about various film production and post-production technologies. They used new equipment like a DSLR camera, tripod, slider, and microphone to film different shots. In post-production, they learned editing techniques in Final Cut Pro like adding slow motion, rain effects, echo to dialogue, text overlays, and color grading to match shots and convey the protagonist's depression. Overall, the process taught them about planning, filming with different equipment, and using various editing tools and effects.