Read through r/malefashionadvice and their wiki, they have a bunch of info on how to improve your style. Specifically, they have threads every day called What Are You Wearing Today which has people take pictures of themselves and what they're wearing specifically (brands, name of clothing SKU) which you can then pick up to buy if you like it, or find alternatives for it.

https://www.reddit.com/r/malefashionadvice/wiki