Use Cloud flare with SSL

Hello,
I have already installed ZERO SSL in my WordPress Website. But now i want to use Cloud Flare with SSL Certificate.
What is the procedure? I have to remove ZERO SSL first from my website or directly use Cloud Flare with SSL.
Is there any issue i’ll face if i activated Cloud Flare SSL in website because i already have a ZERO SSL.
Help me in this.

Thank You.

Cloudflare comes with a certificate anyhow (unless you specifically disable it) and you do not need to configure that yourself, however you still need a certificate on your server too. So whatever you have in place right now, keep it.