Login to your GoDaddy account, find the domain you want to point to your site on Fixers and go to DNS.
Press 'Add' and create a new CNAME record, the host should be 'www' points to should be 'ssl.fixersworld.com' and you can leave the TTL at the default option.
Enter www as your host name
Select type CNAME
Enter ssl.fixersworld.com as the destination
Now press save and you should see your new configuration added to the list of records. Your domain should now be set up on www.yourdomain.com
Next you need to set up a redirect to ensure your domain loads without the www. prefix e.g yourdomain.com follow these extra steps.
Scroll to the bottom of the DNS settings page and you will see a section on the bottom right 'Forwarding'.
Press 'ADD' on the domain forwarding, you can ignore subdomain for now.
Select a permanent redirect,
forwarding to www.yourdomain
Make sure to tick the checkbox update my namneserves and DNS settings to support this change.
Your domain should now be good to go on www.yourdomain.com.