Hi Claire....and welcome.
If you can share a few more details, (you don't have to) you will get more suitable advice, eg: if you have any other significant health issues, if you need to lose weight, how much exercise you do and what sort of things you currently eat.
HbA1c level of 41 or below is deemed to be normal, non Diabetic.
HbA1c levels of 42 to 47 are deemed to be Pre Diabetic.
HbA1c levels of 48 or above is deemed to be Diabetic.
So at 51 you are only just in the diabetic range.
General dietary advice (for type 2's) is to reduce carbs, thats all carbs, not just sugar, so bread, pasta, rice, cake, starchy veg, eg: potato, sweets, crisps, biscuits, alcohol, etc. But we are not removing them completely, we do still need some carbs, most peeps aim for a low carb diet of around 100carbs per day ish, some do 120, some go as low as 50, so you have to find what works for you....
Also worth checking out a couple of other websites for recipe / food ideas:
Lowcarbfreshwell website.
Sugarfreelondoner website.
Plus lots of good recipe idea on here (Diabetes UK website) too.
Some books that are often recommended good reads for diabetics include:
Life without diabetes - Prof Roy Taylor
Carbs and Cals book (in conjunction with Diabetes UK)
Giancarlo Caldesi cookbooks
The Real Meal Revolution- Prof Tim Noakes
Please keep us updated and let us know how you get on and good luck with it.... 😎