Unfortunately I have 12 windows. Really cheap thin greenhouse glass (which scares me to handle). The opening is about 400 wide by 580 high (frame around is 460 wide, 610 high).

I was thinking of getting some security film to stop the glass breaking dangerously and would help a bit with security.

Considered cheap blinds or making some plantation shutter style ones in the frames but looking for inspiration as I have 12 windows. Cheapest option would be some drop in panels on the inside but would like something that would let light in when needed while still providing some privacy.