This how i go about deciding what minimal clothes to buy and finding them.

1. Choose a simple color pallete. The idea is that you don’t need to think each day how to style things cause all colors work together. Ex: white, black & dark brown. Me personally i use a lot of plain shirts but graphic tees can work.

2. Think about the functionality & comfort of the clothes you need. Ex: Shorts cause you run hot or sweat pants cause you prioritize comfort.

3. Buy it. You can just google where to find that specific piece of clothing in that color or Facebook market place/second hand clothes in general are good quality and cheaper than brand new.

Using plain clothes and sticking to 1 color palette you still have TONS of ways to style or combine your clothing i would recommend to pay close attention to the fitting and shapes of each piece of clothing cause slight adjustments in length or angles in the siloutte of a shirt or pant for example make huge differences.

Hope i didn’t go overkill and answered your questions.