[hutzlibu]

"I have noticed that at interviews, I struggle to build a proper narrative and talk coherently."

Is it only at interviews? Than it would be merley the pressure, you cannot stand.

In either case, why not practice talking with logical flow and coherence every time, you have a actual conversation?

I am not a fan of learning verbal conversation by books. I learned english for 10 years in school like this (and had quite good grades). Then I went backpacking into the world - and I allmost could not communicate with native english speakers at all. Very, very frustrating. The only thing that helped, was practice, practice and practice.