/cgl/ - Cosplay & EGL

Trying to get ideas on how to make the main part of Meiling's costume (see pic). My only sewing experience is making accessories for Iku Nagae (shawl, "scarf", ribbons, cuffs etc) and those were pretty much improvised and turned out decently, but I have never made anything like a fitted garment.

While I was looking around I saw a bunny suit tutorial that used duct tape and plastic wrap to pretty much make a dress form-like thing but in the shape of a bunny suit contoured to your body, then cutting it apart in a certain way and making a pattern from that. Would this process generally be okay? I haven't touched actual (store-bought) patterns before and it seems like trying to find patterns for the exact garments I need could be tough.