Hello Alexander
Lots of people have been giving you great advice and held there hand out to you.
I grew up in a housing estate in Scotland, and I think only people who have lived in that situation can understand how hard it is to get out and away.
I left school with some qualifications and went to college for more, but I had no self confidence, I was offered a place at university and turned it down, I couldn't get work and when I eventually found the inner strength to get my self put of my own mire, I found a very menial job, doing cleaning, I have come to learn that the job was the making of me. I have worked my way into a very well paid office job, that I love. Part of that process was bulking out my CV with volunteer work.
I heard the quote if you do the thing you love most in the world you will never work a day in hour life.
I am dying each day I have is a blessing becoming diabetic was something I knew would happen as part of my illness and I was petrified of it happening, when it did hey it wasn't the end just another routine to at to my shortened life.
I get low mainly when I am at home, living is hard when you don't want it to stop, just as hard if you want it end.
You are 21 with diabetes don't give up take it one day at a time start small but think big, don 't turn down opportunities grab them with both hands look out for adult education classes, volunteer, if it is free take it.
Be kind to yourself and try to be the best version of yourself you can be, you never know you might be the person that saves a life in the future.