The move from winter to spring is mostly about lighter layers. You do not need a full wardrobe change; you need pieces that can adapt to shifting temperature.

Start with the main proportion
Keep one warm piece in the outfit, such as a trench, leather jacket, or compact knit. Then lighten the base with denim, cotton shirts, or softer footwear.
Use texture and color with restraint
Spring texture should feel easier than winter texture. Swap heavy scarves for lighter belts, smooth bags, and simpler shoes.
Keep the outfit wearable
Build outfits that can lose a layer gracefully. If the jacket comes off, the shirt and trouser combination should still look finished.