LOEC Asbl provides online courses - 180€ / 60 hours in a group of 15 to 20 - it's a non-profit making organisation, and therefore you can find better quality-price ratio. The certificates are issued by the Ministry of Education. Online courses also allows expats to learn even before relocating. All the teachers are local teachers and know Luxembourg, so it's also also a place where you can learn about daily life, admin, and culture.
You can visit the website: luxembourg-online-education-center.com
There are new courses starting every month.
I am your contact