I made two attempts to watch the movie, but unfortunately I fell asleep each time.
Well I would say try watching the anime, since its likely better. I have seen the anime, so that isn't a blind recommend and it is pretty fun. That said Golden Kamuy is mostly "The Joy of Cooking: 19th century Japanese Survivalist edition" with a man hunt+ battle for buried treasure plot thrown on set in a brief period of instability in the Hokkaido region, its got action sure particularly later on but a good chunk of the time its about surviving and cooking in the great outdoors during winter with a bit suspense now and than.