And it's finished: Banyan Tee from Figgy's Patterns! I love the result and everything matched. I went with boys version as I liked the sleeves better, and my 15 months old wasn't walking when I was sewing it so I wanted shorter version too for her. Now when she is 16 months old and is already walking I want to make her a girls version.
The fabric is from Girl Charlee Fabrics and it was on a thin side as for my first try of sewing with knits :) It looks very cool and it has this vintagy vibe.