Getting in with Herme is going to be a very difficult task.  There is literally a line of people wanting to stage at his places.  Last year, a couple of my friends did two month stints at Herme.  I don't want to discourage, because I would love to stage there too.  But they told me they didn't get to do much.  And a shock to them, many of the processes were automated. Paris has many great pasty and chocolate shops.  Go to a place and see and taste the work they do.  Talk with the person behind the counter.  Ask to talk with the patissier.  You never know what could happen.  I personally think you can learn much more at a smaller shop.  There are less employees which means more duties spread to less people.