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I am in big problem, most of my images are made in interior ambient, dungeons are the preference.
With such illumination in photography is used flash lights that will destroy all the desired scene illumination and soul. And if I want to take a photograph without flash light I have to use manual exposure and have no idea how many minutes I have to expose the film.

For low light scenes you'd set the sensitivity (ISO) to something like 800/1600/3200, exposure to 1/4 - 2 seconds, f-stop to 2 or less.
You should be able to light your scene with a few candle/torch strength point lights then.

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