Your own glucose meter will help you enormously. It will show you instantly what your food choices are doing to your blood sugar levels and give you the chance to change a few things.
Welcome to the forum. I will tag @daisy1 for her excellent post to newcomers.
Not forever, but as @Bluetit1802 says having a meter and using it in a planned manner will help you to understand how foods affect your BG levels, and will help you come to decisions about what and when to eat.