Welcome to the Forum!
There is a
"GB Help" thread that will most likely help you with some of your questions. Note that: Current Problems Noted After iOS 6.0, 6.0.1 and GB 3.7.0 Update Installation; Apparently they have removed the "Push Reminders" from the App. Currently, I use the iPhone Clock|Alarm feature and just set alarms for my reminders.
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.
PS: You can still have the cookies and M&Ms Peanut Butter, but just in moderation. Use them, sparingly, as treats.