In this case I mixed the dress and the jacket.
But, if you love this new trend, and you are afraid to do it for the first time, there are few tips that can help you (at least to feel comfy and not too eccentric, and that is an ideal for a first time). If you are not experienced at breaking the "laws" with your outfits and you're dying to do it, better go little by little.
1._ Try to mix your prints in an outfit were you can take out at least one garment (like the jacket, or a shirt over the top), so, if you feel like really calling too much attention, you can take it off and have a break.
And if you already feel too "shiny", avoid big earrings and necklaces or use small discrete ones.
In this case I went for black.
And you are ready! If you feel comfy, next time you can push it a little bit farther :)
Dress: H&M for around 20 USD
Shoes: Got them on a sale for around 8 USD
Jacket: Got it on a sale in H&M for around 13 USD
Shorts: H&M for around 15 USD
Bag and vintage style jewelry: You already know it!! ;)