Good day.
I use Xara Web Designer 11 Premium. I have created a website www.sosd.sk

The service provider created an SSL certificate for me, and I have to redirect it in the .htaccess file
RewriteEngine On
RewriteCond% {SERVER_PORT} 80
RewriteRule ^ (. *) $ Https://www.yourdomain.com/$1 [R, L]

Can anyone write me the exact procedure where I should insert it? I can't handle it. I'm done.

Thank you for any advice and help.