Hi Jan, welcome. Don't panic, we all started in a similar position, this can be managed.
Firstly, most advice from GPs and DNs on T2 is rubbish. They follow the Eatwell Plate dogma which includes the ridiculous (for diabetics) advice to eat carbohydrates with every meal. Carbohydrates are the enemy and might just as well be sugar.
So you need to cut carbs, especially bread, pasta, potatoes and rice. Many here follow a low carb high fat (LCHF) diet with good results. Don't be scared about the fat, you need to make up the calories you no longer get from carbs. See
www.dietdoctor.com/LCHF for more info.
Get yourself a test meter (such as the SD Codefree from Amazon or EBay - the strips are the best value) so you can test your BGs before and after meals to judge their impact - this is your main tool for managing your diabetes. Most T2s don't get them prescribed so we have to buy our own.
As for what foods to eat, check the labels and try and stick to those that have less than 5g carbs per 100g. Ignore the 'of which sugar' bit, it's the total carbs we are interested in. There's a great book called Carbs & Cals which is nothing but photos of foods and meals with carb, fat and calorie counts.
You may find it daunting at first, but read around the forum and ask as many questions as you like. Help is at hand.