How to stop being so quiet in class?

I’m currently in a new school and I’m extremely quiet in the class, I barely talk and the only time I talk is the person I’m sitting next to which I can easily make up a conversation with. But other than that I’m considered a boring person in my class, I don’t participate in class, I don’t make jokes in the class and I’m quiet invisible since I don’t talk at all much. How do I stop being this quiet at the school cause every time I try to talk I’m scared to.