Tips for looking better? As in dressing nicer, I have good hygiene

>No fucking wrinkles
>Match contrast of clothes to skin, hair and eyes
ie brown skin black hair (low contrast), wear low contrast clothes
>No tacky clothes or huge branding
Some branding is alright and sometimes unavoidable but psychologists found that huge branding is perceived as insecure
>When wearing a belt make sure it's the right color
>Basics are good
but if all you wear are basics you may come off as boring
>Jewelry is good, but don't overdo it.
Also don't mix gold with silver, wear either one or the other

Also another tip that helped me in the beginning is that you should dress better than everybody else wherever you are, but not overdress.
So if you're at school, don't wear a fucking suit. But do wear something fancy if you want.
If everybody is wearing suits, wear a tailored one if you can afford it. But don't go fucking black tie.
If people are wearing some shitty summer clothes, dress preppy if you like it, but don't wear a linen suit.

This distinction between dressing better than the rest and overdressing is not something rigid and depends on where you're living, the social status of people around you and stuff like that so you need to figure it out by yourself.