I cant see the rest of the passage, but im taking a guess that it is no.2!
Answer:
Confident
Explanation:
When you engage with a small amount of people you get to learn and improve your vocabulary,and improve oral language
Your instrument, outside of music, is your own voice. If you love yourself and tell the world (using your 'instrument'), then you can feel fulfilled. This advice is good for anyone who feels like they aren't heard or seen, they can use their voice to speak up and create change for themselves and others.