As far as Type 2 diabetes is concerned, it is by no means certain that the condition will progress to you needing insulin. Normally I would add a caveat here about me not being a Doctor etc. But whoever told you that is plain wrong, google Doctor Jason Fung and watch some of his lectures or professor Taylor if you prefer and British accent.
You have already hit on 2 things I think are particularly important: diet and testing (I would also add exercise). I think one of the first things you will find when you start testing is that 'good' wholemeal bread will still send your blood sugar high......well at least it did for me! Pretty much all bread (with a few exceptions you will find on the forum) is high carb. Carbs should be regarded as sugar as should starch and starchy vegetables (e.g. potatoes).
Anyway you have come to the right place. Loads of great information on the forum and they are a pretty friendly, non-judgement bunch.