C1 course
Common European Framework of reference for languages (CEFR) C1
-> You can understand a wide range of demanding, longer texts, and recognise implicit meaning.
-> You can express him/herself fluently and spontaneously without much obvious searching for expressions.
-> You can use language flexibly and effectively for social, academic and professional purposes.
-> You can produce clear, well-structured, detailed text on complex subjects, showing controlled use of organisational patterns, connectors and cohesive devices.

Self Led Learning Recommendations
In terms of self-led learning and study at level C1, it depends on your individual objectives.
We recommend that you watch, listen and read content in French, of different format and different context.
For example: French literature, opinion pieces or French audiobooks.

DALF C1 (Official French Examination): If you are interested in getting formal recognition of your level, take a look here.