I don't agree with Kathleen Cochran where she says, "Don't dress like the people in the office when you're going for the interview." Maybe you should, maybe you should not. Where do agree is where she said, "Do your homework."
You would be best served to 'look the part.' I'm retired now but spent four-four years in the paid workforce and have held jobs ranging from messenger boy, factory worker, foundry laborer, trucker, clerk, radio officer in the marine, aviation and police fields, and even as an Antarctic expeditioner. In each case I turned up with what I expected people would hire me. That is, in the fashion I expected I'd be working.
For example, you wouldn't turn up expecting to get a job as a trucker wearing a business suit. Jeans, a open shirt, maybe a old leather jacket or such would suffice. On the other hand, if you were going for a job in a conservative office environment you probably would wear a business suit. Once the job was obtained you might drop the suit coat and tie.
Whatever the job, approach those who would employ you like you're ready for the work...or could quickly learn it. Look the part.