Look at the six items you actually wear and note what you like about them: is it the color, the fit, the style (casual, formal, eclectic, etc.), brand, season, and fabric.
As an example, I feel most confident in structured, classic modern outfits— I look for all organic materials (linen, cotton, silk), I tend to stick to a few favorite brands for basics, and I keep a list of what I need to replace/what’s missing in my closet so I don’t impulse purchase vintage t-shirts when I need a fitted blazer.
Thrift stores are really great for exploring your style— so are mood boards. When you see an outfit you love online, take a picture of it or note what about it was interesting.
One thing that I think goes overlooked is underwear— a well fitted bra really changes how clothes, especially shirts, hang and feel. You’ll only wear an outfit if the underwear you wear it with is comfortable. So if you have a dress you love, but aren’t wearing it because it either requires shapewear that makes you uncomfortable, or a nude/backless underwear or bra that you don’t keep in your closet, you’ll get less wear out of the item.
Additionally, know your measurements. Your body size is neutral, but language around sizing isn’t, and it can be discouraging to shop when you have a vague idea of your sizes and end up needing to size up or down. Get a soft tape measure, and get your true waist, hips, bust, shoulders, inseam, and rise. I have a very high rise to my natural waist, and knowing that helps me shop for pants and skirts with less frustration over fit.
Lastly, it’s okay for it to take time— curating your style and wardrobe should be ongoing and thoughtful; a fast fashion haul won’t help figure out what you like outside of trends, and those clothes tend to break down quickly. If you can, try to buy well made versions of your staple items— resale and thrift stores are a great place to find real leather jackets, upscale basics, and one of a kind pieces that you can’t find elsewhere.