Example of message, if writing to strangers is too stressing you out (copy and paste... and change the details to make it yours):
"Hello, I am Jane Doe. I am 23 and I think I suffer from social anxiety and I would like to know more about the type of therapy that could work for me. Best regards, Jane Doe."
You will receive an answer to guide you. You can also tell a bit more about yourself in the first message or give your phone number, in case you would prefer to be contacted by phone or you can call the following line :
+33(0)6 75 34 21 19