@NTexasTu …your cardiology EC, and the fact that it is in an area in which you want to study, definitely makes it stand out. I would move that EC into the “Pro” section. The other ECs (band, clubs, etc.) are commendable; but there are so many applicants with those types of ECs, I would keep those in the “Neutral” category.
You made reference to being “Indian/Black”. If you are considered an Under Represented Minority (URM), it could help your chances as most schools seek diversity in their applicants.
Keep focusing on those essays. It sounds like you have a voice and a story that needs to be heard. I am sure you will make a great addition to the campus!
P.S. If UT Austin does not work out, you should seriously consider Texas A&M. The education you receive and the alumni connections you make there can take you far in life.