Welcome Roythehat from a fellow T2.
Are those numbers from a finger prick test, using a hand help tester?
That amount of rise (and fall back down again) is far from unusual, and likely throughout a day, and from day to day. Yes they are high, you having just been diagnoses.
I recommend keeping a food diary. Self test before and after eating, and keep a record of your levels along with the food diary. Hopefully after a couple of weeks you'll start to see a pattern.
The self testing will allow you to see what effect your food has on your levels, along with any changes you make.
It's not food that makes out blood glucose (bg) go up. It's carbohydrates in particular that does that. Pasta, bread, potatoes, breakfast cereal etc. We can still eat some. Which, how much and what with is the question. This is where self testing will help.
There's another test, the HbA1c (blood taken from the arm and taken away). This gives an average covering 8 - 12 weeks. Have you had one of them? Chase them up on it, and insist on results.