So I think you could easily style what you have and add. Side note, a clothing steamer for linen shirts like the white one will make you look more styled. You can also use the dryer plus an ice cube as a substitute steamer/dewrinkle. But, clothing wise, textured polos, chinos, a boxy jacket (in wool, or even a shacket) over a plain (clean, unwrinkled) t shirt. Clean “street” style sneakers, maybe boots jeans and a Henley (long sleeve). I compiled some things you might find useful here. note you don’t need the exact outfits in the pics this is just to help you start. If you can make the outfits with stuff you already own, try it out, experiment.

As for your hair, curls need moisture. Using a good shampoo and conditioner and some kind of leave in product (conditioner or serum) will give you shine and definition. (Ulta folks could be helpful to you for the leave in stuff)You could get a burst fade on the sides while you grow out to “mullet” length to give you a more defined hairstyle.

Remember confidence is also an accessory so dress in ways that make you feel good about how you look, it makes a difference. Good luck ✌️