How do we get “normies” to adopt the Fediverse?
We don't. Normies take one look at anything that isn't mainstream and pinch their noses. A significant portion of them can barely make a search on the internet, they get lost at the idea of "websites" and are likely heavily biased against people who aren't using what "everyone is using"
Anedoctal experience: back when I was using dating apps, I've had a fair share of girls that stopped talking to me once I said I didn't have instagram, because it meant I was "hiding something".