Hi Jiyon,
We do have MATLAB and Simulink onramp training available, which has several exercises to help you familiarize yourself with using the products.
Our 'Getting Started with Simulink' documentation page may help you as well, as it provides access to many examples and sample models for you to work with.
Lastly, there are also several books we recommend that have theory, real-world examples, and exercises using MATLAB, Simulink, and other MathWorks products.