Getting through the filter is a step, not a win. Once the door is open, everything happens in thirty minutes of conversation, and that is where most strong applications are lost.
The good news is that the questions which trip people up are nearly always the same: tell me about yourself, your biggest failure, why this role, your salary expectations. They look simple, they are not, and nobody answers them well first time.
What makes the difference is not natural ease, it is how many times you have already said the answer out loud. One concrete number, one clear structure, one hesitation fewer.
Practising on a real job posting, with a recruiter who pushes back when an answer stays vague, costs far less than a wasted interview.