I just bought my first Dior Lady Bag too and My one is Baby Pink in Patern, Medium Size, I love it so much. Its very nice colour. Its suitable for young people, the colour is not so bright or colourful , its very light and sweet, you can go with any clothes as well. I have worn many clothes, colours, styles and match with this bag, it goes perfectly. This is my first Lady Dior and a gift from my mother for my birthday this year

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So I hope you will choose the best colour you like. Go for patern, its stunning, shiny, rather than leather, it looks not luxury, esp for this model. Medium size is truly perfect.