I’ve been asked so here are some directions (sorry grammar/ortographic mistakes, I’m too tired to think properly in another language)
Body x2:
A - 3dc, turn
B - increase every dc
C - 1 dc, 1 inc and repeat
D - 2 dc, 1 inc and repeat
Go on increasing 3 dc every row until it covers the upper torso (30cm~ but I’m really thin)

Collar:
Dc without foundation chain until it’s as long as you want the neckline to be
A - increase 4 dc equally
B - increase 2 dc on the shoulders and repeat this row until it covers the shoulders

Attach yarn on the other side and dc in every chain, only in the back loop and repeat for ~ 10 cm. Bind off

Sew the bottom part of body together and then sew the upper part to the collar, roll down the neck (you can sew it but is not really necessary)