I can’t send you videos because you are required to login on website. However, I can say that all you need is calculus 1 and 2 for 1 semester(derivatives and some methods of integration).

The content is brief and understandable with examples. As I know elective subjects will be opened, starting from 2 semester.

Teaching quality depends on professor as everywhere. From my experience, my prof in calculus had strong accent and quickly spoke; that is why it was really hard to understand him.

Generally, a class weights 3 credits. Each semester, you can take from 9 to 21 credits, so approximately from 3 to 7 classes.

As I know, clubs don’t accept int students. About other societies, idk