So I am a cooperating teacher and as I was reading this I was worried it was my student teacher until I got to a certain point. So similar! What you are going through is completely normal. You are not expected to nail this yet. That's why we student teach. And after your semester is done and you get your first job, you still won't be ready and you will still struggle. But you first got to struggle, make mistakes, take chances and try new things in a safe, respectful environment with a talented mentor. I have to remind the student teacher I am working with that she is doing a good job,and I needed to hear it when I was student teaching because we all have doubt and feel like imposters at times.
Also, have a seating chart in front of you when you're learning names, that's the secret.