Here’s how I have installed my portable AC units when I have crank-out windows, also known as casement windows. It’s not as straightforward as when you have a single hung window, but it’s not that complicated either. This project took me about two hours of work.

AC unit: https://amzn.to/3Ui6dtt

Circular Saw Blade for plexiglass: https://amzn.to/3Nm6JmO
Jigsaw Blade for plexiglass: https://amzn.to/43vS26m

Ace Hardware Links:
Optiplex sheets: acehardware.dttq.net/NkzPe2
Circular Saw Blade for plexiglass: acehardware.dttq.net/QyJeG3
Jigsaw Blade for plexiglass: acehardware.dttq.net/rQGb0v