How to use GPT-3 for French text classification?

I have around 20 000 texts in French language.
Each text is the answer to a question.
There are 250 different questions.

How can I fine-tune GPT-3 so that it classifies a text to its corresponding question ?

I an new to GPT-3 and fine-tuning, so if you have a good tutorial that answers my requests, let me know