this is really rough dude, probably needs to be fundamentally rewritten.
"I am" sounds clinical, don't avoid common modern contractions unless you intentionally want to sound like a robot.
"This means, for most of my life, etc" dont start a sentence with "this", its a really vague reference to the previous sentence. also chill with the subordinate clauses in commas mid sentence (and just lower the amount of commas in general). <-- this applies to the entire essay
"Most of us are well-off, living in an affluent area, of Christian faith, Caucasian, and with intelligence in our DNA." holy shit man
"most of us" most of who? you haven't referenced a group of people yet, only an area. fix with "most of the residents of etc"
"of christian faith, caucasian" again, you are referring to the area as both having a faith and having a race, this plainly makes no sense.
"with intelligence in our DNA" do you want your college to read your essay and get the strong impression that you are a genuine racist because thats what this clause portrays.
"With all of these traits ..."
your problem arises from verbiage like "so many" (especially used so repetitively). stop speaking in completely vague statements
"For a lot of my fellow..."
you are combining different styles and tones here. fellow implies casual relationship, comrade implies fierce, militaristic bonds. "too worth it" is pure ugly english. worth "it" means nothing, what is the specific worth of the opportunities? worth the life experience earned, the humanitarian feeling of good, the value in reaching out to communities, or the worth of the listing on your college application? also just slapping too on the front of the phrase completely negates the impact of the thought, as if there is actual debate as to whether the opportunities are worthwhile or not. "perfect bubble" again seems racist/classist/generally falsely superior. be proud of where you are from, but do not consider yourself better than others because of it. no college wants a kid riding a high horse about his hometown.
"But I choose to be..."
"smaller sector" makes no sense in context here, a group of people would never be referred to as a sector. the major issue with this sentence though is that you are continuing to portray yourself as someone who believes themselves better than those around them. not only are other communities below your intellectual capacity, but also your peers who idle and waste their time.
"My group chooses..."
"my group" makes you sound as if you founded and operate the volunteer operations. if this is true, expand on it. if it isnt, then make it clear that the group of volunteering students/citizens is just something you are a part of or involved in. the quote in this sentence is incredibly clunky, dump it or slim it down.
"I chose to go down to..."
this honestly seems fine, still sort of clunky feeling maybe swap "go down" with "travel" or "visit"
"We were a group..."
super repetitive, and makes you seem self absorbed. delete this sentence period