Lighting is king. Once you understand how lighting affects an image, you can then use and manipulate it to take good photos.
In most cases, natural light from the sun is your best bet. If you’re shooting outside, aim to shoot in the “golden hours”: The first hour after sunrise, and the last hour before sunset. In the early morning and evening, the light is soft, warm, and perfect for photography. Try to avoid shooting in the middle of the day, when the harsh lighting might leave you with shadowy photos.
If you’re taking photos inside, open the curtains and blinds to let in as much natural light as possible, and move your subject close to the window. And if you still need more light, consider using artificial lighting. A single flashgun or portable LED lighting kit can make a world of difference and help you to take crisp, bright photos.