Welcome Carl - and also James 🙂
The problem with blurry eyesight is perfectly normal for new diabetics - as others have said, please don't worry. It should settle down within a couple of weeks. But if you usually wear glasses, don't get any new glasses for the first few months, so you can be sure your eyes are completely back to normal before you do.
Re questions 1 and 2, do ask your GP, or whoever ordered the tests, to give you your results - it helps to see the numbers improving as you start to treat the diabetes 🙂 - and it's also reassuring to know that the right tests have been done (or to ask for them to be done if they haven't!). They can be 100% sure it's type 1 if they've done the right tests (as well as HbA1c, they should have done a GAD antibodies test and a c-peptide test), though given your relatively low weight and general healthiness, they may feel they have enough information with just some of those - for instance, I don't think they bothered to give me a c-peptide test because my GAD antibodies test results were so astronomically off the scale. As Pheobe says, though, doctors are much more likely to misdiagnose people as having type 2 when they really have type 1, I've not heard of it happening the other way round either.
I've no idea what a CP is (sorry Pheobe!), but now you are on insulin you can and should eat some carbohydrates - just don't overdo it! Brown bread, brown rice, and potatoes are all OK in small portions, but try to avoid white bread, white rice, pasta, and pizza for now, until you get the hang of which foods suit your metabolism (it varies from person to person, so you will need to test 2 hours after meals to find out). Fruit will mostly be OK in small portions, but avoid fruit juice unless your blood sugar goes under 4 (have you been taught what to do if this happens? - it's important you know.). Oats might be OK for you (it varies from person to person) but try to avoid packet cereals as they are very sugary. If you eat things like biscuits stick to plain ones, like Hobnobs, and one at a time!
But overall, eat plenty of fish, meat, eggs, dairy products, nuts, veg, and salad, and try to make sure you eat your carbs at mealtimes along with these for now.
It's worth asking your diabetes team (have you been referred to a hospital diabetes team, or were you diagnosed by your GP? - if the latter, ask your GP to refer you to a diabetes specialist nurse, or DSN, at the nearest hospital, asap) if in the longer term they would change you to multiple daily injections (MDI) instead of the mixed insulin you're on at the moment, as mixed insulin is a very old-fashioned treatment, though they do sometimes still give it to new diabetics while they are getting used to things. Don't let the idea of MDI worry you - the multiple is 4 rather than 2, not a huge number - but it makes a huge difference to what you can eat and when, and means your lifestyle can be much more flexible - you will be able to eat whatever you want whenever you want, more or less, rather than having to eat to match your insulin.
