I was diagnosed T2 around the same age, although in my case for more typical reasons, I was overweight. I quickly lost several stone by eating a high fat, low carb diet and got my blood sugars under control but as the years progressed it still got worse (even though I was slim) and ended up on insulin injections, which in some ways is a godsend because now I can eat anything pretty much. (I am still slim though, I haven't used it as a licence to be a glutton.)

You should be able to eat moderate amounts of higher carb stuff, if you really can't then you may need to pressure your GP to get referred to hospital as I did, otherwise in my experience they are happy for you to have high or highish blood sugars indefinitely. I had a few weeks where mine were in the 11-13 range which to me is terrible, and my GP was like 'this is fine'. Incredible.