7 or so years ago I bought an old brownie camera and I found a roll of film in it. Still have no idea what's on it. I read that I shouldnt expose it to any light.
Take the film out, keep a bit of tape or rubber band at hand so it won’t unroll, you want to keep the wind pretty tight.
Then either send it to a lab or develop yourself!
Put a nice color film for your next roll, the juxtaposition of “modern” color film in such an old camera is fun.
Shoot in bright daylight. High noon or at least some sun.
These shutters are almost indestructible. The cameras certainly are nice shelf queens, too.