Although a type 1 I’ve also been through it. I have an article of my journey in Chat Magazine issue 30 in shops on 19 July.
The advice you’ve had here ref carbs n fats are great.
There is a carbs n cals book that’s available if you want to see portion sizes actually on plates as to how they work out for “guesstimating” carbs.
Protein is essential for well being and healing from cancer so things like eggs, almonds, brocolli, chicken, beef, tuna, milk and Greek yogurt are very good for cancer & diabetes...