refresh python knowledge before interview?

Im a person that easily freaks out and I feel quite embarrassed for that so please forgive me for using a throwaway. My friends know me for my awkwardness and constantly finding a way to fuck up my first impression with new bosses. (kind of like that malcom in the middle episodes with hal t the company picnic).

My problem:

I didn’t prepare properly for the interview and procrastinated. The job requires Python and my friend recommended me to the manager and he may have overexagerated on my python skills.

I found a list of commonly asked python questions hich was incredibly useful. However I was wondering if anyone here has some tips to decrease my nervousity level and perhaps some tips on some personal questions I should prepare myself for. I suck at people skills which makes me very worried.