I stumbled across this post on a Facebook group for foreign entrepreneurs in Aix.

So I thought I’d go along and say hello. I was particularly interested to hear if anyone else had any visa issues or tax advice.
Café Lille is a lovely spot in Aix with nice coffee and it was a nice opportunity to meet a few people in the same boat.
There were about 15 of us altogether ranging from tour guides to wine tasting specialists, from wellness experts to web developers and designers.

It was really interesting to hear how everyone was making a living.
And there was some good advice re taxes. You have three years to correct mistakes apparently so it can wait til I have my visa.
On that front, I emailed la direction générale des étrangers en France to ask how long the visa change might take.
They replied to say there is currently no time-frame and that I should get an email after each stage.
I’m am yet to be contacted about any stage!!!
Eeek!