How do I use my domain with my Blogger account?
In order to link your domain to your blog, you need to take several simple steps:
1. Set up your domain in your Blogger account as described here in Step 2: Connect to your non-Google domain from Blogger.
2. Once you have added the domain, you will get two CNAME records that you need to configure along with the A records in your Namecheap account: