I can see why you would ask me this, but the times seem to be so different and yet so the same. In my experience, as far as running away to Paris with Nicolas, I only have simple, nearly instinctual advice, unfortunately. Keep in mind that it has been a long, long time since then.
Firstly, I would try to work out your financial matter thoroughly; there was a time or two when other than our apartment, we weren’t much richer than the homeless of Paris. Secondly, dive in and immerse yourself in this city with all your heart and soul and love it as if it were a living, breathing person. Cities have personalities as well as any human. Thirdly, heartbreak from home will ache but remember that your family and friends are only a letter, or email, or call away. Remember that you are not alone in your travelings, and if you were, you always are capable of working your will.
I apologize if this is little help to you but just let the city throw you where it wants you and don’t be afraid if it isn’t where you thought you would go.