@Racso_ , there's an infinite number of ways in which people react to being dx'd, but, for practical purposes, it boils down to two: people who step up to the plate, accept that it's a messy, unpredictable, random condition which can have horrendous consequences if you don't deal with it properly, find out everything they can about it, and go on and live happy, full lives. And then there's others who just say, oh, woe is me, ignore it, and end up with complications. People often end up switching between the two.
I'm worried that you're post sounds like you're tending towards the latter camp. You need to look on the brighter side. You're shy etc. Who isn't at your age? Even the loud ones have their own insecurities, which they cover up by being loud, and, frankly, irritating most of the time.
You've managed to get to uni, so you're obviously smart. I was the first in my family to get to uni, my parents were and are still proud of that, so don't let your folks down.
Use your intelligence to do some swotting up on the current state of T1. One of the mods here, tim2000s has a blog, diabettech, where he analyses new stuff in a very mathy way, so you might like that. He's reporting on a new faster insulin, Fiasp, at the moment.
There's some fascinating stuff in development: smart insulin, which switches on and off depending on presence of glucose (if, a big if, it works, say goodbye to hypos), HDV which taxis insulin to the liver to reduce post-prandial spikes, and a wide variety of continuous glucose monitoring systems which heavily improve the odds - google or search this site for freestyle libre, dexcom, medtronic.
I generally manage my T1 well, but the randomness still narks me from time to time. Whenever it gets me down, I remind myself of people like Eva Saxl. She and her husband fled Germany during WWII to Shanghai to escape the Nazis, only to find thst insulin supplies were cut off after the Japanese invaded. Did she lay back and die? Hell, no! They set up a make shift lab in a basement, found papers on how to make insulin, and made their own from water buffalo pancreases, enough to save Eva, and several hundred others too.
During a war. Heroes. None of us have the right to complain about the odd hypo/hyper when all we need to do is pop round to the chemist to pick up insulin, and have some sweets for hypos. There are still people in the third world who die because they can't afford insulin. We are all much luckier than we think.
Look around this site. There are people who curl up and ignore it, and then regret it once complications set in. And then there's people who deal with it head on, and then head off backpacking round the world for a year. It's up to you what you do.