Hi Andy, welcome to the forum 🙂 Don't be frightened by the statistics - what you read probably refers to the situation as it used to be long ago. For someone newly-diagnosed who takes good care at managing their diabetes, there's no reason they shouldn't live as long a life as anyone else - and possibly even be healthier than most too in many other ways. It is a serious condition, and therefore needs to be taken seriously, but if it is then, to quote another member 'well-controlled diabetes is the major cause of absolutely nothing' 🙂
You'll get lots of support and advice from the other parents here - and the rest of us, of course!