Welcome. We can't give dosing advice, you will have to contact your consultant or diabetes nurse. If you record your waking, bedtime and before breakfast, lunch and dinner BS, insulin dosing and carbs (and protein), over a few days, send it in, and they should be able to advise you on your background insulin, insulin dosing for different times of the day due to IR, dose splitting for higher fat and protein meals etc.
However, like you, I follow Bernstein. I'm on Fiasp and Levemir. With Fiasp, I try to use exercise as a substitute for the second part of a split dose, but only after my BS have bugan to rise. I don't have fixed timings but just follow the numbers.
I recommend this book:
Stephen W. Ponder, Sugar Surfing: "How to manage type 1 diabetes in a modern world."