The documents I need for obtaining Carte Vital and Assurance Maladie

Bonjour,
Excuse moi que je ecrit en anglais.

I need Carte Vital (Numero de Sociale) and Assurance Maladie.
But I am not sure what type of formular I need to follow according to the web page below.
https://www.ameli.fr/bayonne/assure/english-pages

My concern is, I have paid activities with no employer so it makes me confused if there is SURELY nothing more than those documents as described below.

My situation is:
I have titre de sejour, and the expiry date is march 2020.
I am surely going to renew my visa on January 2020.
For one year and half, I have worked as a freelance graphic designer registered at Maison Des Artistes and auto entrepreneur with SIRET number from Urssaf.
So I am not employed by a company but self employed and have factures from my clients.

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the printed form application for the right to health insurance (S1106);
copy of your work contract or your last pay slips ;
birth certificates for yourself and all members of your family ;
marriage certificate ;
passport or ID copies ;
proof of residency (Utility Bills, rental contract, etc.) ;
particulars of your bank account (RIB - relevé d'identité bancaire). These can be found readily available in your French cheque book ;
your first pay slip.
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My questions are:
Considering my situation, to obtain Carte Vital(Social number) and Assurance Maladie,

• what other documents should I prepare?
• I have Acte Naissance validated on July 2019, by tradituer assermente. Can I submit Acte Naissance validated more than 3 months ago?(It costs me a lot;))
• As I don't have my Social Security number yet, I cannot make RDV with CPAM. Is it ok if I go to CPAM without RDV?

I have called CPAM English service and a kind lady told me that I have to contact at CCI Bayonne to get Carte vital.
So I called CCI and a kind lady told me it is no sense to ask Carte Vital to CCI since it is CPAM in charge.
I also called URSSAF and Maison des Artistes and all they say it is CPAM.... Please help me to get Carte Vital and Assurance~!

Merci par avance!