Bortez, I’m assuming you are a responsible and mature young woman. That being said, I think you would be doing nothing wrong asking the Jewish guy your questions. Here’s the catch: You obviously are not comfortable talking to guys. So, even if you DID ask the Jewish guy your questions, you would probably not gain much because you would be so flustered talking to him in the first place, it would be difficult to focus on calculus. Since it is essential that you know the material to do well in this course, you should ask whoever you would feel most comfortable talking to, so that you can gain the most information. I actually took a calculus course recently, so perhaps you can ask some questions here.
Health, I’m sure you didn’t mean it this way, but “shiksa” is considered to some a derogatory word.