Replying to Clever college classmates come closer

Tried to make a clever title but this is basically a thread about what classes you took as a college freshman. I'm trying to gauge where I am academically.. Math In specific. I'm planning on attending CU in the fall and currently enrolled in the college of arts n sciences in the pre engineering track..
I took AB my junior year, did okay.
Took BC this year as a senior. Really grasped the calc 1 concepts. And did decent with calc 2 concepts.
My question is, what would you guys take as an incoming freshman?
I hear calc3/diff eq is rather easy on the calc scale. Tho at the same time I'm weighing being a freshman, figuring it all out, heavy course load, Sooo..
What am I better off doing?
ANY info/insight on majoring in ENGINEERING would be great
Take it easy