The next step is to choose a prototyping tool that suits your needs and preferences. There are many prototyping tools available, such as Figma, Sketch, Adobe XD, InVision, and Balsamiq. Some of them are more focused on visual design, while others are more focused on interactivity and functionality. You should also consider the level of fidelity of your prototype, which refers to how detailed and realistic it is. There are three main levels of fidelity: low, medium, and high. Low-fidelity prototypes are rough sketches or wireframes that show the basic layout and structure of your design. Medium-fidelity prototypes are more refined and include some colors, fonts, icons, and images. High-fidelity prototypes are very close to the final product and include all the visual and interactive elements. The level of fidelity you choose depends on your research goals, questions, budget, and timeline. For example, if you want to test the usability and functionality of your design, you might opt for a high-fidelity prototype that allows users to perform tasks and scenarios. If you want to test the concept and feedback of your design, you might opt for a low-fidelity prototype that allows users to focus on the content and flow.