Place your subject based upon the available light if possible. Your subject is best either in full sun or full shade and not a mix of the two. If your subject is in full shade be aware that the camera tends to see a darkened image and you may wish to increase exposure several stops. In "Auto" mode your flash may pop up. Take the shot and if you have a preview function take a quick look at the result. You may wish to change from Auto to aperture priority (AV) or program (P) mode and check for better image quality. Try not to shoot with the sun directly behind your subject unless you are trying to take a silhouette.
Also, be aware that intense daylight sun reflected through you camera lens may cause bright spots in your image, commonly referred to as image flare. Image flare may be removed with post processing software, but its easier to avoid initially. Bright sun, snow, or light sandy areas tend to reflect the ambient light and can brighten up your images but be careful of too much highlight or a washed out, aka over-exposed image. I prefer some cloud cover over a clear blue sky, as this condition softens the light however, too much of this such as a rainy day and it cast a coolness to an image. Early morning and evening are ideal times for landscapes as you will see increased contrast, longer shadows and softer, more pleasing light.
Whatever the results, keep taking images, that's how we learn.