I think you may be overthinking what’s a good EC for a soph. Go volunteer at a meal site once/mo, keep at it for 2 years, you’ll list it as 10, 11, 12. It’s a good thing. There’s always some who need the help and it will widen your perspective.
Get off the dime. Don’t hold yourself back.
We don’t know what your idea of a great college is, but they need you to think and take action, stretch. That beats waiting for the perfect opp, perfect timing.
And I don’t mean volunteering at random, through some club, which can be more about friends and fun for an hour or two.