Use ISO 800 to 3200 film to record as many stars as possible in that time. Stop lens down 2 F stops from wide open. ISO 400 to 1600 Exposure range 5 min. Close the lens 2 stops from wide open. Exposures of 5 minutes to an 30 minutes or more.
Maximum exposure depends on sky darkness again.
Correct exposure for your site will vary with film chosen. ISO 400 ISO 3200 for exposures as long as your sky conditions will allow. If conditions permit, expose even longer to record best detail. As your ability progresses you will want to use slower films to capture finer detail. As well as greater color saturation.