Take it from a guy who wears anything and people still find it fashionable and say it looks good on me. Hit the gym and get fit, Build some muscles, man. Then, even if you wear a Primark T-shirt it will look like Prada on you. There is a physique that transforms George to Gucci and others that transform Gucci to George.
Save your money, my man. Don't waste it on big brands. Physique + affordable brands + cheap accessories that most guys don't wear such as beads, leather necklaces and wristbands = a great, unique sense of style. Now, that's your sartorial dilemma sorted.
Do this and come back and thank me later.