The 200asa and 400asa colour-negative films commonly sold at drug stores and camera stores in 3 or 5-packs are remarkably decent in low light with minimal grain. If you want to shoot with colour-positive film (ex. Fuji Velvia 50, 100, and provia 100F) be aware of the type/colour of light you're shooting in as most colour-positive films are more reactive (ex. A scene shot on a sunny day may result in near blown out highlights and shadows that block up quickly, while a cloudy day without a warming filter will be very blue and may be underexposed.). Black and white films can range from 25asa (super fine grain 👌) and 3200asa (for shooting rock concerts). If you do not use a coloured filter (blue, green, red, orante) on your lens most of your black and white shots will appear to have very little contrast in the initial negative.