Welcome to the Forum!
I am much the same as you, in that I don't know how to do anything half way. I suppose that comes from my engineering background. I am glad that you are back on the wagon. I hope that GlucoseBuddy will help you as much as it has helped many of us to stay on track. Remember to test often, the best test for me is the one before bed. This is where I can usually clean up any mis-calculations, on my part, from earlier in the day with a bolus dosage. Usually I am right where I need to be at between 70-99 fasting.
Read through the first three threads in the Type 2 Section, when you get a chance, if you have not already done so. These threads will most-likely help you a lot. Self education is one of the keys to successful management of your diabetes, along with a healthy / sensible diet and exercise. Basically, diabetes requires a life-style change for the better. Good luck with your control and management.