Basic mending skills (replacing buttons, hemming, fixing small holes, darning) extend wardrobe life dramatically. Most repairs take 5-15 minutes. Most adults don't have basic kit and abandon repairable garments to landfill.
Basic kit to keep at home
Needles. Thread in main wardrobe colours (black, navy, white, grey, brown, beige). Scissors. Spare buttons. YouTube tutorials for any specific skill you don't know.
Two hours learning basics produces decades of wardrobe extension. Most expensive ratio of effort to benefit in clothing care.