If you are looking for information on how to handle stress, how to control anger, how to be mindful and self-compassionate, the sheer number of resources available on these topics should reassure you that you aren't alone in whatever you are feeling or experiencing. You can find some examples in the links below.
However, it's also important to talk to someone - a trusted adult family member or friend, a teacher or counselor, and to recognize when you might need some more professional help.