The details from the paragraph that show Mia's feelings without stating them directly are: her sweaty palms, her racing heartbeat, and her fear melting away once she started to dance.
Based on these details, it can be inferred that Mia is feeling nervous and anxious before performing her dance. The sweaty palms and racing heartbeat indicate her physical signs of nervousness, while the fear melting away once she starts to dance suggests that she is able to find confidence and comfort in her passion for dancing. These details paint a picture of Mia's inner turmoil and eventual transformation as she faces her fears and immerses herself in the joy of performing.