I wouldn't recommend sewing a jacket for a first time costume sew.... What I would do is buy a jacket an then modify it w sewing for the chain and such. As far as the skirt, there are some great simple skirt patterns at Joann's, just look for sewing level 1, maybe 2. As far as material, it depends on budget....
Kpop cosplay is life~
Cory- 24K U R So Cute **DEBUT**
PO- Block B Tell Them **DEBUT**
Baro- B1A4 Solo Day (Beach scene) **DEBUT**
POSSIBLE DEBUT: N-mi: VIXX Girls So Hot (VIXX So Hot cover)
CL- 2NE1 I am the Best