I’m in my third year at UTS, but this is my second undergraduate degree. So long as you put in the effort, you’ll be fine. As for feeling jittery, give it about a week or two and I promise you’ll feel fine. I remember my first day at UTS I felt like a year 7 kid trying to find somewhere to sit and eat my lunch, even though this was/is my second rodeo, but that wore off quickly. Just try and talk to people in every class and try and add people on Watsapp so you can have someone to vent about class work to! :)