Any good conversational AI tools to practice for interviews?

I have an internal interview coming up. I feel huge pressure because if I get accepted I will get a visa to move to the US which has been a life long goal of mine since a kid. And my company up until now has not been easily handing out visas. I'm a software engineer and the role is another engineering role. I do feel like my skills are very aligned. But my problem is I'm not a great speaker. I'm very technical and a great engineer but in interviews I kinda stutter and skip over most of the things that I had prepared. Or I'll skip the whole STAR method and just randomly answer it how I think sounds right, even though the prep Pdf says I should answer in STAR. I used Gemini Live to try practice but it's kind of bad. It kept just stopping or not hearing my long answers. So I'm looking for another AI I can provide all the context and job description. So I'm looking for an AI I can go back and forth with just to improve my verbal pitch for each question.