Redecorating my bedroom in a vintage style.?

The elephant in the room, so to speak is the flowered curtains since it seems they do not go with anything else. Replace them with a solid color that blends with your walls. You didn't say whether the colorful cupboard goes with the curtains or with the bedding, which you didn't mention. So , I will just say that perhaps you have too many colors going on. But if you like the flowers, then perhaps it is the blue wall holding you back. It is hard to diagnose. Just decide what you want it to look like and go for it.