Hi Brando and welcome to the exclusive club of diabetics! Getting to grip with diet is quite a steep learning curve and there is much information to digest, and some of it can be conflicting, so my advice would be to browse the internet and look at some of the most recent research findings as many of the 'truths' that have shaped official advice over the past decades are now being challenged and there are indications that NHS/NICE and other bodies are slowly overcoming their inertia and starting to change tack.
One thing I would suggest is that if you want to understand how what you eat impacts on your diabetes and blood glucose you should start to test your BG before and after meals. It's true that high carbs foods push up BG, but we are all different in our reactions and what pushes up mine might not do the same with someone else. (I can't eat porridge, others can.)
You have to be rather careful with bread as it is all high in carbs, though some breads are higher than others, white bread is particularly high in carbs.
Here's just some data about breads from the Composition of Foods Dataset, this is the dataset used by food manufacturers to print the data on the back of packaged foods.
Bread, White Crusty Bloomer - 52g/100g
Bread, Seeded - 43.8g/100g
Bread, Wolemeal - 42g/100g
Bread, Burgen,Linseed oil and Soya - 25g/100g
Protein Roll, High Protein, Lidl - 9g/100g
I know that eating a slice of bread really pushes up my BG, but once in a while I find I can't resist a half slice with cheese anad marmite! The Lidl rolls are pretty safe from the carbs aspect but I'm not that keen from the taste point of view though lots of other folk enjoy them.