Study hours that needed to achieve each level :

A0 - A1 : 60 - 90 hours

A1 - A2 : 160 - 180 hours

A2 - B1 : 210 - 350 hours

B1 - B2 : 400 - 500 hours

B2 - C1 : 700 hours

C1 - C2 : 1000 hours

A1 : CH

• Duolingo (any other app)
• Listen to music
• Watch youtube viseo about the languge
• most commonly words and phrases

A2 : FR - KR

• Duolingo (any other app)
• Study music lyrics
• Watch youtube videos with sub
• Make flash cards in anki
• Listen to podcast
• Grammar
• Read articals-manga-manhwa-posts
• Take a course

B1 :

• Duolingo (any other app)
• Write dairies
• Study music lyrics
• Read articals-manga-manhwa-posts
• search anything in that language
• watch shows with sub
• Make flash cards in anki
• Grammar
• Listen to podcast
• think in that language

B2 : EN

• Reading books
• Watch shows
• Make flash cards in anki
• Practice speaking
• Video/voice journaling
• Watch videos about different topics

C1 :

Study seviral languages at once :

• Study one in the morning and one in the evening
• Study one for 2h and the other for 1h
• The 2 languages have different levels
• If there is 4 languages study 2 for everyday and 2 day by day

C2 :