I will configure a free SSL certificate for your Blogger site. The certificate is free forever with renewal every three months (renewal required just log in to free SSL site)
Google Search result giving priority to the encrypted site using HTTPS instead of HTTP. SSL (Security certificate) is costly with yearly charges where Blogger site having difficulties to install. Thus the certificate is totally free of cost and will provide the further guide to it in future by yourself.
If you are not easy with providing admin details, then we can manage it by using TeamViewer remotely to install the SSL certificate in your blogger site.