Expect tons of work to do, and learn to manage your time efficiently. This is certainly not the first time you heard this when you asked for an advices like this, but I'm speaking from my experience here. I am majoring in physics, have a lab to do almost every week, and one lab equals to one report to write. The work is fine at the beginning since I can basically just chill along way, that was until the middle of the semester where it starts to get busy. Every classes have one assignment to do, I wasn't ready for it until I got like 6 things to be done. 4 assignments and 2 lab reports that's starting to get overdue. Glad that my lab lecturer is fine with me handing my reports later or else I'm going to get overwhelmed more than what I had from the work.