What do you mean exactly? What do you want to do with your SSL certificate?
What do you mean? As far as what I could tell your site is working fine here with SSL:
Also since your site is using a Cloudflare SSL that is using a Baltimore root certificate which is trusted and should already be installed on all devices then your visitors should not experience any related SSL error.
Though installing your own root certificate in your visitor’s PC automatically is not possible AFAIK then you will need to provide a download for your root certificate for your visitors to manually download and install your self signed root CA certificate in their PC first or else the browser will show an SSL error related to your certificate being not trusted.
Also why not just use a free TRUSTED SSL certificate from Let’s Encrypt? InfinityFree designed a tool that is compatible here to issue one for your site which you can use for free.