Hi,
First, sorry to chime in quite late in the convo.
I am an FR translator ambassador and I can provide you with a short summary of how this happened.
I started translating content in FR directly in this forum, following the same format or close to the inital blog post, CF post and so on …
Try to use the same formatting as some FR posts I have made myself in the past. example here.
Put a FR flag in the title that you can do like this :fr: and a link to the original translated content at the bottom of your work. Do not forget to put the adequate subsection (education, translation, french) when you create your post.
After a while, and if you keep posting regularly, you might get picked up for the ambassador program, or nominate yourself to become one. This happens after the fact, not before.
Cheers,