Hello and welcome!
Blimey Rhea, you do have a lot to cope with, but diabetes can be controlled with some effort on your part, and you sound like a person prepared to put that effort in.
As has been said, cut the carbs right down, especially the main culprits (bread, potatoes, rice, pasta, cereals and all sugary stuff). Obtain a glucose meter and use it to learn which foods you can or can't cope with. We are all different and can all cope with different amounts of carbs, so only by using a meter can you discover your own limits. Just as an example, I have learnt I can eat one slice of bread but not two. I can manage 3 small new potatoes or half a dozen chips, but no more than that.
In my opinion, it might help if you replace the Shreddies with a Greek yogurt (plain) with a few berries added, or eggs in any way, shape or form for breakfast, and also cut out the cereals at night. That would be a good start.
Good luck, and stay with us!