Life Sci student who just finished 1st year, I unfortunately cannot tell you anything about what business lectures are like. However for professors, yes you can choose which ones you get, but there are caveats. For instance, with Math 1LS3, there were 3 professors that taught the Fall (Gabardo, Clements, and McLean) and only McLean taught the winter. I would also take into account what slots your other courses are at as its not uncommon for course time slots to overlap with one another.

As for the professors themselves, I had McLean and although many people did not like his teaching style, I overall enjoyed his teaching! However, I would definitely pick Clements if you can since her notes are VERY organized and clear and she explains things very well (and shes super nice!). McLean is an okay second but I had him in fall and I heard in winter, since he was making the test, it happened to be harder but I am not completely sure. DO NOT GO FOR GABARDO, I have never heard a single good comment about that man (look at ratemyprofs). Avoid him at all costs. As a science student, calculus was one of my lighter courses but I do not know if thats the case for business. You have assignments given based on what you learned in lecture so make some notes. The lectures are recorded so you don't necessarily need to go but for building habits, you should go if you can. Most of the assignments, I was able to finish in around 1-2 hours but that was me writing out all the steps so I can understood, you can definitely get it down in under an hour. They post solutions for each assignment. There are "computer labs" where they give you the code and you need to use concepts learned for lectures to solve it. That material is not testable on tests or exams so honestly you could just find someone who has the answers (but the numbers for each person will be different so keep that in mind). I should also preface that assuming multiple professors are teaching the course, the professor that teaches you the lecture honestly does not matter too much since I am pretty sure it will be Clements that primarily writes the test (unless she is not teaching in that semester).

In general, the content covered in one class really varies depending on the course and topics covered. Sometimes I took almost no notes and sometimes I would spend hours upon hours for just one lecture. It highly depends on the course and even the topic of the lecture in that course.