High level of anxiety can be really damaging to a child’s health and mental well-being so it is good to keep anxiety at a low level. Low to moderate levels of anxiety have actually been linked to higher academic, social and sport performance.
You are attending a new school and are anxious about not knowing anyone there and meeting new teachers and classmates.
Look at your body language and see how you feel, then decide what would make you feel better (e.g. take a few deep breaths, talk to someone about it, relax your muscles by squeezing and releasing parts of).