While you are doing your internship, dig deep into yourself and try to be as self aware as you can. Meaning, use this experience to determine if you really want to be in the field you are exploring. Are you okay with the quiet and isolated lifestyle of working in a cubicle all day? Do you want to be more hands on or less hands on? Are you good at the work you have been taught, or do you find it difficult? Asking yourself these questions can help you make decisions on what companies to apply for, and for what positions.
Additionally, while this needs to be unsaid, do remember to stay as professional as possible. There are many different platforms of communication used on a day to day basis, and all of them deserve a different style, or level, or professionalism. For example. my quick chat to a coworker on Microsoft Teams is much more casual than an email to another department with my manager CC'd to it.