Then maybe it is already time to allow yourself a chance to miss your targets more often.
However, I agree with
@Hopeful34 that your target range is unusual. The usual target is 4.0 to 10.0. I understand why you may have a higher upper target as you are newly diagnosed but (as a non-medically qualified person with Type 1), I would recommend raising your lower target to 4.0 as a minimum, Anything lower than this is hypo and a sudden hypo is far more dangerous than a sudden hyper. Plus it is not a good idea to familiarise your body with lower target as this can reduce your hypo awareness.