umm no. You test your blood, which tells you how much 'sugar' is floating around in it. Basically speaking, anyway.
You don't test for insulin levels. You test your blood to see if you need more insulin, or more food. Seriously, you need to speak to a doctor. Can't you come back to the UK for a short while? It would be much better for your health. Even if it's only for a week or so.
Do you know the basics, like carb counting? How to deal with low blood sugars? How to deal with high blood sugars?