Hello,
Are you in the UK? Dexcom has a criteria and it’s not offered routinely to everyone. Even more difficult because you are newly diagnosed.
Have you asked your team about a libre sensor? (That has a criteria too) Are you still testing your blood glucose despite eating badly, facing mental health issues and not feeling great?
We all manage by testing our BG levels, carb count and adjust our insulin for it - this you can ask your team for advice, also adjust insulin for planned activities, if it’s unplanned, carry extra carbs on you, have you asked your local GP for therapy?