You can make mistakes in your sketchbook and you'll get better with practice. Try to fill one page of your sketchbook everyday. Getting started is always difficult, especially when you have a new, empty book. If you don't know where to start, try one of the following ideas. Once you've done your first sketchbook, others will be easier to do.
Many artists choose a theme to follow in their sketchbooks.
You might draw scenes around your neighborhood. Most people have collections of things. A collection can make a good theme for a sketchbook. If you have a collection of toys or dolls, draw pictures of them in your sketchbook. You can also draw pictures of shoes, old hats, tools, kitchen utensils, or other items found around your house.