Ok so this is the guide you want to use:
What it means is that you need to think and decide on the fullly-qualified domain name (FQDN) before proceeding any further. Some users will want to run a website at the ‘www’ address, hosting their discourse instance on a different name such as ‘community’, ‘forum’ or ‘discussion’.
So if you decided you want to use:
your FQDN would be:
And you would create an ‘a’ record for ‘discussions’ pointing to the new server IP under the DNS control panel for aviation-airways-va.com at namecheap.
Once you know what the full URL is going to be, that’s what you create an ‘a’ record for. Follow the guide I linked above.
Also, please try to stop replying to yourself, if you want to add to a reply please do exactly that and edit the last post which hasn’t received a response. This isn’t a web chat and it wastes a lot of screen real-estate when a whole screen is filled by only three or four paragraphs. It’s why the edit option is there.