Ok. I see! I think because you’ve only done it for 3 years it’s a harder sell especially because you have so much listed. Good that you highlight that during interviews!
Also if you can find a way to talk about how you are new to flute but have found “your thing” in an essay that might be a good idea!
Since I’m not your parent what I’ll suggest is that you sit down with them while doing applications and figure out which ec’s to leave off your application to make the important ones stand out. (For instance skiing - so many people from New England grow up skiing, if it’s not a competitive situation is it really an ec?)
I hope some of the more experienced parents will chime in on that topic for you.