Is it normal to be afraid of a job opportunity and should I take it if offered the job?

So I may have the job but I have to go through a second round of interviews but they are looking to hire the candidate by Monday. And they want the candidate to be able to teach an orientation course in the future.

I'm nervous about teaching because I've never done that before and I am quite shy. I don't know if I can do that but I need the job. So it's like do I swallow my fear and take it if it's offered to me on Friday if they give it to me after the second interview? Or not take it even though I really need the money and job.
Take it, you need the job and you have to overcome your fear
Don't take it, it's not worth you being outside your comfort zone
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Is it normal to be afraid of a job opportunity and should I take it if offered the job?
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