Levemir and Novorapid may well be "very popular insulins for Basal/Bolus",
However the whole point of a basal/bolus insulin regimen is to facilitate so-called 'normal eating': ie. the following of a meal-based diet, just like anyone who is not diabetic.
But you do not need to aim to eat normally (as though you weren't really diabetic), if you don't want to. I don't, just because I am not normal: I'm diabetic.
So instead, I always take the same insulin each day. (Indeed I find that I only very rarely need to make adjustments.) And I 'feed' that insulin - testing my blood sugar as I go - throughout the day.
I never need to 'count carbs'.
And my past three HbA1C readings were 27mmol/mol.