It's beyond me !!!

AnthonyHow long have you been in this country ?
SeungTwo months.
AnthonyIs it hard for you to study at an American college ?
Seung Yes, I find it very difficult. Especially when you can't follow the professor's lecture.
Anthony That's because you just arrived. Do you like biology ?
SeungNo. It's beyond me.
Explanation :
If you say that something is beyond someone, you mean that they cannot deal with it.
Example :
Although he could give her sympathy, any practical help would almost certainly be beyond him ......