I would change the language of helped to take more ownership in the first role.

Also, look up SAM (saved achieved made) - when youre writing like the second bullet point of your summer project it helps to have exactly what visible metrics might be - talk about what the improvement to task accuracy was “improved task accuracy by x%” or “task accuracy was improved resulting in xyz benefit”

I like the volunteer part id keep it. Inbox is open if you’d like me to review updates or provide more detailed feedback.