Smart blinds can also serve a similar function. My bedroom catches some light from passing headlights and there’s enough light pollution to affect my sleep. However, my SO really struggles to wake up if it’s dark. Smart blinds have been a great solution for us. The biggest drawback is noise. Affordable blinds are not silent.
As the current owner of a 1930’s era property with tons of glass and rubble in the ground, please don’t. We have landfills so that individual properties don’t get filled with trash.