Hey @Brigittebidet my 13 year old DS was diagnosed in May, like you it was a bit of a shock (understatement)! It is very overwhelming to begin with, especially all the 'lessons' you're given on carb counting, insulin, glucose levels and so on, but romdowa is right: it does very quickly become second nature.
My message to my DS was that his life wasn't over; he'd get to have the same life, it'd just need a bit more planning in future. And that's proven true: we eat out (he LOVES eating out!), we've just had a bonkers activity holiday with sea kayaking, SUP and coasteering, he hangs out with his mates, he was back at school within a week. Yes, he doesn't snack between meals now and yes we have to manage his glucose levels, but honestly? His life is not that much different to how it was before.
I'd really recommend a Freestyle Libre 2 glucose monitor - DS wears it on his arm, it connects to his phone, and it sends continuous readings to him, me and his dad, and the hospital. No more fingerpick tests! But makes managing glucose levels 10,000 times easier. You may need to push for your DS to get one but really - do it.
The LIFT glucose drinks and tablets are super handy for treating hypos on the go. But equally x3 jelly babies do the job and are a lot easier to get hold of.
Carb counting gets easier with time. Download the 'carbs & cals' app as it's really helpful.
Get on the waiting list for an insulin pump. One of my oldest friends is type 1 and he said the pump really is a game-changer. Waiting lists are around 6 months where we are.
My GP wasn't very helpful to begin with when it came to repeat prescriptions. This is quite common, as diabetic 'kit' is expensive, and they want you to order every few days for some reason. I made myself a massive pain in the arse until they agreed that I could order all of my DS's prescriptions once a month. This makes it much, much easier to manage (for me).
It IS doable. You will get through it. There's loads of support out there.