Hello and welome,
A couple of questions if you don't mind. What was your HbA1c? Have you been prescribed any medication?
A little about me- I'm a lot older than you and overweight. When I was diagnosed I was devastated. The advice from my doctor was to reduce portion size (? assumptions ) and eat healthy carbs- don't test my levels and at some stage I would need to start insulin. I found this site- went very low carb. HbA1c well within normal from first test after diagnosis- 3 months in and remaining in normal range and have lost weight. My doctor horrified but unable (not unwilling) to argue that low carb is working- very unhappy with method albeit happy with result.
So have you been told not to test your levels or to test them. No matter the advice my strong recommendation is to get a meter and test. This is the only way to work out what effect whatever you are eating is having on your levels. Without this information you cannot make informed choices.
My second recommendation is to at least log your carb intake- other advice very much depends on whether you are on medication.
Read around and post- I promise you have found the best place in the world (in my opinion) for anyone diagnosed with diabetes.
Welcome.