Good point on the keep your mouth shut actually, another tip since you are coming into this with a wealth of previous real life experience.
Don’t be that guy who argues with the prof every lecture about how “that’s not how this works in real life /in industry /etc.”
I knew a couple people who liked to pull those stunts back when I was in school. And it just leads to a lot of wasted time and frustration. There are times for personal experience, but those are truly few and far between in university.
Remember that you are there for academic pursuits, in an academic environment. The real world does not exist to those people.