With a family member who has been HR for many years her advice is as some have said. Conservative dark (inexpensive) suit. Wear a tie that doesn't attract attention and no matching pocket hanky. Please please shine your shoes and get a haircut. Clean shaven is another requirement and no colognes scented shaving lotions, or scented hand lotions. To wear that suit well, dignify yourself with good posture.

Wish you the best my friend

Regards

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"What you hear in a great jazz band is the sound of democracy. “The jazz band works best when participation is shaped by intelligent communication.”
Harmony happens whenever different parts get to form a whole by means of congruity, concord, symetry, consistency, conformity, correspondence, agreement, accord, unity, consonance…….