Hi, Mrrzy. I will now pass along some tips on interviewing which I learned from a speaker who had been an HR person and had conducted many interviews.

1. Get your hair styled. (This was aimed at college students, most of whom let their hair just grow.)

2. Get your teeth cleaned, so you will feel more confident about smiling.

3. Smile during the interview, so the interviewer will picture you about the place, smiling.

I think the last thing is the most important.
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I'm sorry for your many misfortunes, but I hope the interview goes well.