Good recommendations so far.
Here is a good analogy that I've heard and related a few times.
The aperture is basically the size of the hole in the lens. It's represented by the F number, which is actually a ratio between the hole and the focal length. The important thing to remember is that a lower F number is a bigger hole. So F2.8 is bigger than F5.6.
The shutter speed is the length of time that the shutter is open to let light in, usually it's expressed as a fraction of a second. So when you see the numbers in your viewfinder, you might see 60 for the shutter speed, that means 1/60 of a second.
The aperture, shutter speed and ISO (sensitivity of the sensor or film) work together to give you your exposure value.
Think about taking a photo (making an exposure) as filling a bucket with water. If you use a large hose, the bucket will fill in a short amount of time but if you use a small hose, the bucket will take a longer time to fill up. You can think of the hose size as the aperture, the time to fill the bucket as the shutter speed.
The smaller the aperture (higher number), the longer the shutter speed will need to be.
Read that last sentence a few times.
The precise combination of setting, will depend on how much light you have. The camera has a built-in light meter which can help you.