Humanities Core at UCI harsh graders?

I am a history major and therefore required to take humanities Core. I am a bit scared because of what everyone is commenting about it. Most of the time I hear that it is a lot of writing and reading. And although I am a history major, my writing and understanding of complex works are not so great. However I can do the work, I was just wondering are the professors harsh graders? I have lecture with Lazo and seminar Walsh. What do most students get in this course? Is it okay if I have two other courses (black studies and anthropology? Will I not survive? Sorry for all the writing i’m nervous.