Congrats on getting the meter & checking, so many don't & are told not to test by their medical team.
So you're newly diagnosed but are already seeing sub 7.8's at 2 hours post meal all while eating 100g of carbs per day, this is very encouraging.
The 9's at one hour are not unheard of for non-diabetic individuals but would have to be a result of a heavy carb meal.
So lets establish your potential to improve, were you over-weight & sedentary at diagnosis by any chance ?
For most immediate results begin reducing carbs from your meals & replacing them with protein/fats you enjoy.
Reducing or eliminating snacks will smooth the roller coaster that is your blood sugar.
This is a marathon, not a sprint & your most valuable practitioner is yourself.
This resource will be here to answer all your questions.
Good luck.