Hi,
@KevGr , yes, it is a shock, we've all felt that way at the start but it fades once you get a few of the basic rules of T1 management under your belt.
I went through the, "it's not fair, why me?" stages too, but, at the end of the day, it's just biology, and biology doesn't do "fair".
It might seem very limiting at the moment - your docs might put you on set meals for a while to reduce some of the variables - but that's only for a while, and you'll soon learn that T1s have a lot of leeway with food.
Provided you pay attention to the amount of insulin you take and how you time it, you can go out for a curry, Chinese buffet, three course meal, a few beers at the weekend, just like anyone - I do that sort of stuff often and still keep my levels in check.
It becomes something which you just learn to fit in with your life. A bit of your body has stopped working, so, instead of hating it, try to think of it as something you need to look after, care for (it'll take some time to look at it like that, but it's do-able).
I almost died when I was dx'd, full-on DKA, diabetic ketoacidosis, thought I was going to be some sort of cripple sitting on the sidelines for the rest of my life.
But a few months later, I was standing on my skis in the Scottish Highlands on a sunny spring day surrounded by beautiful scenery, thinking I am so not dead, and the only thing I needed to think about from a T1 point of view was whether I needed 1 or 2 units of insulin for a couple of bacon rolls at lunch.
It's terrifying at the moment, but, believe me, you will find simple ways of dealing with this, and will look back and wonder why you were worrying about it.
Good luck!