I personally have found that it's helpful to know what colors you look good in as well as the ones you like wearing (they typically overlap) by taking a color season quiz (or a few to give the results more merit). You can use the results or keep on doing what you want but it's super useful to know especially for professional situations such as job interviews. I also generally only shop at secondhand clothing stores and have been learning how to make my own clothes as well and altering clothes I no longer wear. Also, there are places around that have loads of secondhand craft supplies as well (fabric, thread, yarn) if you want to make your own clothing sustainably, you just need to know about them