Undergraduate / "Engineers turn ideas into reality" - Cornell Supplement! [4]

The Descriptin for College of Engineering at Cornell is as follows:

Engineers turn ideas (technical, scientific, mathematical) into reality. Tell us about an engineering idea you have or your interest in engineering. Explain how Cornell Engineering can help you further explore this idea or interest.

I don't know how to start this essay. Can someone give me some ideas on it?

Undergraduate / AADP charity - Extracurricular Activity for Common App [4]

In the space provided below, please elaborate on one of your activities (extracurricular, personal activities, or work experience)(150 words or fewer).

Asian American Donor Program (AADP) is a charity organization that matches patients and bone marrow donors. I initially supported office operations such as copying and filing. Later extending my responsibilities to phone duties; putting together donor test kits; making calls to reach out to potential donors; and gathering donors' and patients' information. In supporting the staff at AADP and talking to donors and patients, I got a good understanding of the plight of patients who need bone marrow transplants and the difficulties of locating matching donors. I have learned about those in need of healthcare and the challenges they confronted. With an aging population in the US, I feel healthcare is a good place for me to build my career. Through this and another healthcare internship with the City of Alameda, I got a better perspective about the needs of my community.

Can someone help me edit for content and grammar? Thanks!