I love decoupage as a way of transforming dull and plain into colourful and wow! It’s so easy and anyone can do it!
I gather some pva glue, which I water down a little and a small paint brush. An old plain blue standard lampshade and some thin printed paper with old florals and seeds adverts that create the look I’m after. You could find any images on paper that you like and catalogues magazines or print out from internet.