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A suggestion - nothing more

ISO

The lower your ISO, the less digital noise you will have. Although modern cameras are improving noise very quickly, I suggest that you start by setting the lowest ISO you have.

Shutter

To start out with, you probably don't want any motion blur in your photos, so set the shutter speed at faster than, say 1/50 of a second.

Apperture

This leaves apperture - leave apperture on automatic so that you can get the correct exposure having set the ISO and shutter speeds.

Try it out and see how it works for you - then have fun changing things.
When changing settings, it is often best to choose one setting and change that, rather than making lots of alterations at once.