I finally found the right sewing course for my tight schedule.It's more like a private lesson and the name of the course is Kursus Tata Busana Wiwi.
Here is the link to their website : www.kursustatabusana.com
They have a more flexible time for the course and the lecturer Mrs Wiwi Siat, is a professional designer with more than 30 years of experience.
I give the link to her own website: www.wiwicouture.com.
I will post some picture of our learning process later.