I am french and moved with my english wife to France 18 months ago . I lived 20 years in the Uk , moved straight after uni .
You will have to register to local sécurité sociale ; you wont be able to get your own carte vitale straight away but you should be able to go on your wife card . Need it for doctor , work if working in france .
Register with pole emploi , you wont be entitled to benefits but you will have access to free french lessons and other training if you wish .
Go to your local tax office as tax system is changing in january .
And that is about it , till march at least , after that all bets are off !
and enjoy the skiing , biking, wine , food etc….