You just plug it into the wall like a computer. I don't know why you think you need to install anything.
If you only need level 1 charging, or you already have a 240v outlet in your garage, sure.
Otherwise, you're gonna need an electrician to put a 240v outlet or dedicated EV charger.
Some people have to park on the street and therefore do not have anywhere to plug in anything. Also, some people park in apartment buildings where there are no outlets near many of the spots.