You could replicate the results by closing the aperture down to the smallest opening (the largest number... Example, f/16 is smaller than f/2.8) Once the aperture is closed, set the shutter speed to 10, 15, 20, 30 seconds. Now you can try it outdoors on a very dark night, or maybe in a windowless room like a basement or garage with no lights on.

Tripod or table set the camera, turn off the lights, start the exposure and have fun making funny or spooky faces with a flashlight... Also try "painting" a wall with a flashlight or laser pointer... Colored celophane over the light can make interesting colors on the wall or whatever... Different object closer and farther away from the camera that are large enough "trees outside for example" give other kinds of effects as well. Just go out and have fun.

As far as film and digital goes... Everyone has their preferences, I prefer being able to see my images right away, but others like the anticipation of waiting for the film to be developed... Others still, have fun doing the developing themselves...

Whatever you prefer, film or digital, you can get very similar results.