Hi @Emmaasndco, again not as professional advice or opinion:
If it is Humulin N, then as you say, it would be a twice daily injection. If you google 'pictures or profile of humulin N' or NPH' you will see graphs of its action, including when its peak is (most strong BSL-lowering action) and its duration (length of action). I can see that its action is not going to deal all that well with the usual 2 to 3 hour peak of BSL from a meal.
It is more like a 'background' or basal insulin. You may also note that the peak of the evening dose is in the early hours of the morning so one needs to be aware of hypos being a risk then. But check this with the DSN
So one year ago your pancreas gland was making insulin (that is my understanding of your C-peptide result). Assuming that is still the case your own insulin might be able to help deal with the meals.
But LADA has not been ruled out, nor that your current high BSLs don't have some underlying reversible cause (like an infection - teeth, urine etc).
It would be a pity to be placed on insulin if you really did not need it at this stage.
Perhaps a chat with the DSN can help you with a way forward and to seeing that you you have things fully sorted.
Bestest Wishes.