How do I know if the domain name I want is available ?

Whois\Domain Name Search tool, which will also help you choose a domain name:

https://domains.easyasphosting.com/eah_whois.asp

Also, during our our process our system checks if your domain is available. If it is, it asks if you want to register it, order hosting, or register and order hosting together. Please note, if you want people to access www.yourdomainname.com your site will have to be registered and hosted.