How to get SSL Certificate

Hey ! I’m creating a new website and I would like to have a SSL certificate because when I’m connecting to my website with Opera, I have a little box of Opera which say “Connection no secured” …
So I searched on Google how to get this certificate and I followed a lot of processus and finally it always said an error … So if somebody can help me that would be cool !
Codux (sorry for language I’m french)

I think I have to purchase premium on XVHOST to get SSL certificate no ?

I just read this topic and I understood

You don’t need to upgrade your account to get a green lock on your website. Upgrading to XVHOST does give you advantages like the ability to upload a certificate chain and free SSL certificates through Let’s Encrypt, but it’s in no way required.

What’s your domain name so I can check it?