Hello Stueys and welcome to the forum.
It's not nearly as daunting as it first appears. The first thing to do is remember that we [diabetics] must control our BG levels. This means cutting out sugary foods and drinks. Secondly, carbohydrates turn to glucose, so in other words they turn to sugar, so you must reduce and limit your intake. How much and how far is a very individual thing, and you need a meter. Your GP is unlikely to give you one, but never say never, some of us do get them, I was prescribed one and unlimited strips until my last HbA1c. Now I am allowed 50 strips a month, so as I did before I was prescribed them, I fund my own.
Foods.
You must cut out all starchy carbs, white bread, rice, pasta and potato's as well as processed foods and ready meals. Don't buy low fat, light or diet versions of foods as they contain a shed load of sugar, manufacturer's add sugar to replace the low fat. :roll: Diet drinks are fine as long as you are ok with chemical sugar substitutes.
You can eat as much meat, fish, poultry, game, seafood and dairy as you like. Watch out with veg, produce grown below ground is more carby that it's above ground cousins. Fruit is a bit of a minefield, most of us can't tolerate banana's, melon or grapes as they are just little balls of sugar in effect. However strawberry's, blueberry's, blackberry's etc [all berries] are usually fine.
You will see some of us have attached to our signatures "eat to your meter" this really is the very best way to go. Test before your meal, then +2 hours to see what effect the meal has on your BG.
My last piece of advice for now is, ask questions, when you have the answer ask more, and keep asking until you feel satisfied and you feel better able to deal with this. I promise it won't take long and this new normal will be as second nature to you as your lifestyle is now.
xyzzy will probably post his experiences and it's a goldmine of information and support, and Daisy will post the information given to all newly diagnosed diabetics to get you started.
Good luck - Joanna.