Hello and welcome to the forum.
I see that
@Antje77 has already given you a useful link.
In relation to testing my thoughts (as a needle phobic) are that regular testing (before meals and 2 hrs after the first bite) is the only way for me to get the information I need to make good choices about what I eat.
Diabetes comes with the possibility of some significant health risks. to reduce the risks you need to manage your blood sugar levels. There are a few approaches people take. The approach I took was to try to manage my levels with only diet and metformin. By testing regularly I can tell what foods my body copes with and what it doesn't.
If you are on any medication such as insulin that directly effects your blood sugar levels (rather than metformin which is not direct) then you really need to test regularly because there may be the risk of a hypo.
Most of the medial profession seem to consider t2 as a progressive illness. There are many on this site who have demonstrated that it doesn't necessarily have to be if you are willing to make the changes to your diet.
Most here find that their bodies do not tolerate carbs. Regular testing will let you know if that is the case for you. With the medication you are on you may want to reduce your carbs more slowly with very regular testing.
There are many on here with experience of medication so I will leave more advice to them
Let me end by saying welcome and you have found the best place in the world for diabetics. The people are awesome and this site gives you hope that you can manage- no thrive despite or. maybe because of the diagnosis.
Stick around and post and read- Good luck