I have type 1 and have novomix 30 twice a day with a 500mg Metformin tab. That's it....don't even know what basal or bolus is....!
I recommend asking to modernise your insulin.
Novomix has a mix of slow acting and fast acting insulin.
It requires you to eat at the asme time every day and to eat the same amount of carbs.
You have no flexibility to miss breakfast orhave a later lunch or have omelette one day and pizza he next (if you fancy).
It does not take into consideration any change in your insulin needs due to illness or stress or exercise.
Basal insulin s slow acting insulin that provides the "base" needs throughout the day.
Bolus is fast acting insulin that works with the food you eat or corrects a high level.
If you don't have breakfast, you don't need the bolus insulin.
If you have an omelette, you dose less insulin than if you have pizza.
If you don't get around to eating your dinner until 9 o'clock, that's fine: you take your bolus when you eat.
If you have a really stressful meeting that pushes your levels up, you correct with some additional bolus.
If you are ill and need more background insulin, you can do so without needing to eat more.
And, if you want pudding, you can have your ice cream ... with a little extra bolus.
You can even have an ice cream cone on a hot afternoon.
The basal - bolus regime requires more effort because you have to calculate your insulin dose and inject more often (at least once per meal and one extra).
But, most of us feel the flexibility it brings is worth it.
When I was first diagnosed, twenty years ago, I was taking fixed doses of mixed insulin like you and it really did not suit my lifestyle. My blood sugar levels were all over the place and I was having to eat when I didn't want to. I lasted on that for less than 6 months ago and been so much happier since.