Student Teachers who just show up and observe do not make a good impression. Ask if you can help with daily responsibilities, set up, copies, and all kinds of things. Assume you are an interim assistant and be of service. Mostly keep quiet until you are told to interact with students. Be very careful about that. Ask questions about operations and observe as you take tons of notes.
Having a degree is license to start your career-the learning process is just beginning. Make sure your cooperating teachers have a great view of you for references in the future.
Finally, clean up social media. I've walked into interviews where they had my Facebook page pulled up. I had nothing embarrassing posted, but they will dig you up. Promise.
Best of luck! It's an exciting time.