I must admit that the feeling of cutting the prepared embroidery's not an easy matter. There's a piece of my heart in it and fear of spoiling it.
I cut the sleeve pieces and I've sewn them to the sleeves along the lower hem (the line on the right). Then I turned it to the right side and sewed it to a circle.
The embroidery had to be completed which took me some time. I draw all the leaves freehand, with very sharp yellow pencil. When the pencil is sharp enough it lets the track easily.
I folded the upper edge inside and used my favourite (not really, but the most useful for me :) ) invisible backstitch.