There are three basic variables for any exposure.
Your camera can do ~1/100 or "B" where you simply hold the shutter open for as long as you hold the button down.
Your camera ~f/8, not a variable.
ISO or EI. The bigger the number the more sensitive it is.
In your specific camera using the normal 1/100 shutter speed, 100 ISO film is best for bright sunny shots, ISO 400 for late afternoon outside or shaded mid-day shots, maybe inside with fairly bright lighting.
To do a nice job inside you may need to use "B" mode with the camera sitting on something solid.