Low GI is good since the really good low GI foods are healthy and nutritious and, important in the short term, keep a person sated for longer. As well sugar, you may benefit by removing artificial sweeteners such as aspartame since scientific tests indicate they may be particularly bad for diabetics.
Treat this as an opportunity to develop healthy eating habits for the rest of your life. At it's simplest, replace processed and highly refined foods with simple, nutritious "whole foods". It can be difficult at first, but gets easier with time.
Striving to improve in every way possible.