We can infer that Luiza is nervous because the text states it in many ways. For instance, the text states, "She wiped a drip of sweat from her forehead." This shows that she is nervous because she started to sweat. Also, it says, "Her hand shook as she brought her bow to the instrument's strings." This shows that she is nervous because her hand shook which means she shivered. Therefore, we can infer that Luiza is nervous.
