I got T1 diabetes at 18, which seemed on the old side, but I know someone else who got it in their 30s.
Right now don't worry too much about your sugars being very unstable. It is normal, both because you are learning how to control your diabtes and because you will probably experience something called "the honeymoon phase". Not sure I can remember the ins and outs, but look it up.
Get a good book about type 1 - some fdor type 2 will be quite different.
I have recently done a diabetes course called DAFNE, which has been great. It is not offered to people who have had diabtes for less than a year, but keep it in mind.
I find it useful to break carbs into portions (this is a DAFNE thing but also a general diabtes thing). So a slice of bread at 20g of carb would be 2 portions. A bag of crips would usually be one and a half, quavers and wotsits 1. A jaffa cake 1. A sachet of porridge with milk 2. Start reading labels and comparing the results (eg 2 slices of toast with a little jam would be the same as 2 and a hlaf potatoes). This seems really complicated now, but in time will be second nature.
Watch out for "no added sugar". It can still contain sugar. Does't matter in squashes, but fruit juice is quite sweet.
There is nothing wrong with carbs, you need them, enjoy them! If you want a sweet thing, dark chocolate or a little ice-cream (not sorbet/ice) will have the least severe effect on your blood sugar. In time you will be able to have more of a free reign while maintaining good sugar levels.
If you are having a lot of hypos you are taking too much insulin. sometimes a cut of one or two units can be enough. Don't wait a week to discuss with your nurses, call them every day if you need to. It is what they are there for!
Exercise has a big effect on blood sugar and this can be delayed across the next 24hrs. You will learn how to predict this in time.
Well done on your good readings. It is early days!
Feel free to PM me.