Agree with this comment. You don’t want to “humble brag” your ECs because of your parents’ connection.
to OP: you’ll hear a lot from the others here and in other forums: you’ve done well. But there are TONS of students with similar/more impressive credentials than yours if you want to try Ivy and other T20 schools. No one here knows what a good essay is because it’s so subjective. What you think is a “hook” maybe something that AO has seen thousands of times. ECs and volunteering are subjective too.
Be careful of going to school where your friends go. Find your own path! You’ll meet new people and expand your horizon. Also, are they going to UPenn or are they applying to UPenn?
Where do you want to go? Climate-wise, big city/campus town, where do you want to work/live after graduation, start thinking about those questions first. You’re from Georgia - will you survive, let’s say, Michigan winter if you go to UMich? Can you handle winter storm in New England?
Couple of other comments: your EC #5 - internship at real estate development firm. What matters is what you do there. Same with #4 - what kind of presentation? #1: the magazine and blog - what good is it? How useful is the blog? What do you actually do and what actually the organization does?
Whenever students mention their roles in “international”, “national”, or large organizations, etc, I will always ask probing questions or dig deeper: are these really "international’ or “national”, what do the students exactly do there? Similar when HS students said that they could develop implementation of early-stage cancer diagnosis: did they really do it, or did they get ideas from someone else? Make sure you can precisely and concisely explain your ECs.
So please make sure you have a strong case.