Important point, I did IB, but I didn't finish it. So at that point I couldn't handle that workload. But I'm hoping I can now, with less tears.(But to be honest I think the hardest part about IB wasn't the workload but the culture where being stressed out of your mind is a virtue.) I really hope I'll be able to enjoy this, and it feeling like a fun thing rather then a terrible thing to power through. But it'll be fine. I think. It's just all a bit scary.
It's wild to me that this is so universal across national borders. A friend of mine did IB in Mumbai, I did it in Nebraska, and you did it in Sweden, and we all complain about the stress culture. I promise that my first year of college was much easier than IB, and by the time it ramped up I was prepared for it And it's okay to be scared! Just try to focus on your own growth and well-being, I have no doubts you're going to kill it :)...the culture where being stressed out of your mind is a virtue.