I don't if there is an equivalent to the My Desmond course that is in my area but that is for prediabetic/ Type 2 newly diagnosed which your G P could refer you to.
However by looking at the learning zone here and at the various links and asking questions as you have you will glean lots of ideas and suggestions for making changes to your diet that will improve your levels.
As prediabetic you are in a good position by reducing your intake of high carb foods by cutting out or reducing portion size. you do not need to do anything drastic but you do need to do something.
The book or app Carbs and Cals is really useful for enabling you to make better food choices.
Basing your meals on meat, fish, eggs, dairy preferably full fat as it is lower carb, vegetables and salad, some fruit like berries are better than tropical fruits.
It is a good idea to make a food diary and note everything you eat and drink and try to estimate how much carb you are having and start by reducing that by say one third. If people choose to go with a low carb regime they will keep to less than 130g per day but some people do go lower but that is a good place to aim for. Better to reduce carbs gradually to avoid vision issues that some people experience.
Getting a blood glucose monitor for testing at home is something highly recommended as it gives you the control of your diabetes.