Can I use My Carte de Vitale while my name change process is ongoing?

I received my social security number a few days ago and so I requested for a certificate of rights. But not yet recevied anything regarding the creation of compte amélie nor the carte de vitale yet. When I received the attestation the droits, I was bit surprised to notice that I didn't have my second prénom. I heard it's normal to have only one first name and one last name. However, I decided to submit a request to the health insurance and add my middle name.

so, my question is

1) Am I going to receive a letter or something like this to create my Amélie account? while having the "name adding process"?

2)Let's say If I receive then create the amelie account and carte de vitale while name adding is in process. Can I still legally use it? but can order new vital card again when my second name is added? Note: It was my personal choice to request to add my middle name. Besides that every details are correct. Thank you, very much have a good one.