Hello Anne. welcome.
Basically it's carbohydrates we can't handle to well, especially the starchy carbs, i.e. Potatos, bread esp white, rice , pasta. Fruit juice is best left alone as it's full of sugar.
Sugar is just another carb so when reading labels ignore the sugar content as it's included in the carbohydrate content.
The thing is not to go mad and cut things right out, best to cut down a bit else you may not be able to sustain it. Also till you find suitable substitutes fill up on veg that grows above ground.
We do get to eat good tasty food. Here's a sample of what we can eat.
If you eat meat, it's fine for us as are high meat content sausages and burgers, butter, cream, some nuts are low in carbs, cheese, fish , veg that grows above ground and diet drinks.
To give you some ideas have a read of a thread called
What did you have to eat yesterday
https://forum.diabetes.org.uk/boards/threads/what-did-you-eat-yesterday.38940/
It's best to test your own BG (blood glucose) as that is really the only way to find out how various carbs affect you, we are all different in this.
Sadly most T2s are denied this tool that would help them the most, many silly reasons are given, i.e it would only stress you, the Hb1ac is all that's needed ( it only give an average over the last 12 weeks , it hurts (it doesn't) and so on.
If your practice won't provide one and you want to test, while you fight them the SD Codefree meter available online from Homehealth
http://homehealth-uk.com/all-products/codefree-blood-glucose-monitoring-system-mmoll-or-mgdl/
is the cheapest one to self fund the ongoing cost of the test strips around£7 for 50 shop brought brands are £15 upwards.
We use the mmol/l measurement in the uk and you're entitled to claim VAT relief.
We have lots of interesting reading and a suggested book on a thread called
Useful links for people new to diabetes, scroll downt to the T2 section .
https://forum.diabetes.org.uk/boards/threads/useful-links-for-people-new-to-diabetes.10406/
For future reference you'll find it on the pinned section of ' Newbies say hello here ' forum.
And ask us all the questions you need to.