my subdomain doesn’t open with https https blog.husnu085.com
Welcome to the Cloudflare Community. 
Your domain does not use Cloudflare. Your DNS is handled by GoDaddy. The site at blog.husnu085.com is using an untrusted self-signed certificate. That needs to be replaced with a valid certificate The server is also redirecting requests for blog.husnu085.com to the non-existent hostname www.blog.husnu085.com. That non-existent name is too deep to use Cloudflare Universal SSL.
You have a lot that you need to fix here, but none of it involves Cloudflare.
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