"Yeah, I'm a pretty low key person and a bit of a homebody."
Read as: "I am so terrified by the immense abuse I have suffered that I am barely capable of even the most basic social skills and have a panic attack every time I leave the house."
On a first date i'd also avoid the past. Even without being traumatic your past has some privacy. For some it's more private than others. But it's never the goal of a first encounter.