Bruh.... Here's your shopping list: (Get your measurements from an older gentleman at a men's formal wear store, tell them your cousin is getting married and ask what is in style) Black or charcoal grey suit or tailored/fitted/slim fit shirt and pants, solid white shirt with spread collar, neutral solid color tie and black polished oxford dress shoes with a leather sole. None of this rubber sole plebe mess. Make sure the heels are hard enough that they click when you walk. This announces your presence and shows them you are better dressed than they are, because we know they can't physically handle leather soled shoes in their line of work. You'll want a thin black leather belt (I assume you are thin here) that matches your dress shoes exactly in color and sheen. Dress socks that match your tie. Fresh shaven, fresh haircut. The length of the pants is important here too long and you look like you're going to court too short and you look like your going to a wedding in a cheap suit instead of a tuxedo. Your pant leg should have a single wrinkle (slight) (1) from resting atop your dress shoe when standing and should prominently display your attention to detail for coordinating your socks and tie when sitting. Windsor knot that tie and be sure the bottom of your tie touches your belt when standing. minimize the garbage in your pockets, and get yourself a tie bar that matches your belt buckle color/sheen/style. Find someone with an 30k plus car to drop you off. You'll need a ride if you intend on driving home in your new fair weather car. You own a programming startup, are in a hurry, and would like to know if this is the car you're driving home today.
Hell this'll get you some phone numbers on your test drive.
Seriously though, at your age you should consider spending your savings on investments rather than depreciating assets. An investment in your education is likely the best way to spend your money. Save and work now, so you can live later. Still buy the dress clothes, bitches love dress clothes. Especially educated bitches that have't yet realize their economic value.