I sewed in the garts - right from the armholes. Here you can see that I pinned the thin linen so that I could cut the lower edge symmetrically (mainly the garts' lower part).
I wanted to iron the hem, but I found out it would be easier to just fold it like origami:) By the way, linen is really similar to paper..
Actually, I wanted to make the stitches that would be visible by hand. Eventually, the whip stitch I used seem like kitsch to me now. I fell in love with the stitch and use it more often than I should have:-)
So this tunic is finished for now. I'll see if the future owner will want some editing..