I'm not sure if you're aware (I'd need to search DDF to see if you sent me condolences) that I am in the year of mourning after the passing of a parent. It is customary that for 11 months a mourner leads prayer services (and even when not, like on Shabbos or days like today and tomorrow - a celebration of new month, Kaddish is still recited by the mourners).
You've been to 770, but not when it was fully crowded. I've had people who stay in the back for services mention to me that they appreciate when I lead services or recite Kaddish in the front, as they can hear it loud and clear.
If I haven't said it before - sorry for your loss.
Going OT for a moment:
I, like you, suffer from loud person disease. When my mother passed away, and I started saying kaddish, someone in my shul came over to me and explained to me as the loudest person in the room, it was my job to take over and keep people in sync - i.e. help set the pace for kaddish so that we were all saying it in unison. As I thought about it, I took it on as a personal responsibility.
My shul has a lot of people who are ba'alei teshuva. If your hebrew/aramaic language skills aren't strong- the words of kaddish can be daunting. When those people came to shul after shiva, I made a deliberate effort to slow down to help them acclimate. Many of them thanked me afterwords.
My point - G-d made me loud in order to use my volume to help others
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