Confusion

An emotion that involves appraising an event as new, complex, or unexpected; unlike interest, it (confusion) involves further appraising the target as hard to understand and probably incomprehensible.

Reference:
Silvia, P. J. (2013). Interested experts, confused novices: Art expertise and the knowledge emotions. Empirical Studies of the Arts, 31(1), 107-115. doi: 10.2190/EM.31.1.f.