The best way to practice initially is to familiarize yourself with the Microsoft Word program by getting practical, hands-on experience.
Take note of the layout of the program, click around the various drop-down menus and explore the different capabilities it has.
You can also search for information about how to perform tasks on Microsoft Word by looking online or asking questions in reputable forums.
There are also practice test samples available online that can help you to become familiar with the specific questions you may be asked.