With digital cameras one can also have a quick preview of the shots taken, and check the output to review and improve their work. But, whether learning photography using digital camera or a film-based one, learning the basics will greatly help while shooting different subjects.
Whether it comes to basics of film or digital photography, understanding the exposure triangle is imperative. The exposure triangle constitute the ISO, the shutter speed, and the aperture. Play with the different settings of these three elements and review your shots.
Many digital cameras have the option that shows the exposure as 0 (zero), which means the scene is properly exposed, underexposed setting is displayed with the minus sign, and overexposed with a plus.
Some cameras even allow slow shutter speeds of 1 second to 30 seconds, and few digital cameras shutter speed setting have 'bulb' setting that allows the user to keep the shutter open for as long as the user wants.
For shutter speeds higher than 1/8 you will need a tripod or the image stabilizer option. Faster shutter speed will allow you to capture the motion lines like the traffic lines. Slower shutter speeds will allow you to freeze motion like water droplets falling.
One important point to remember is that f/22 is actually smaller than the setting of f/2.8, which means that when there are smaller denominators there is larger f-stops and vice versa.
Basics of Composition
Understanding the basics of composition will greatly help to shoot better pictures. One way to compose your picture is to fill the frame, second way is to understand the rule of thirds.
To understand the rule of thirds imagine two equally spaced vertical lines and two equally spaced horizontal lines in a rectangle. The four areas where the lines intersect with each other are the points where one should try to place their subject. As these are the areas where the eye is first compelled to look at.
Basics Controls of Digital Cameras
So, practice with different exposure settings in your camera and remember to follow the rule of thirds to compose your shots better. Good luck!