You could make use of wordpress.com and build website on it using the subdomain.wordpress.com, later after getting familiar with wordpress you can move to selfhosted www.ads-software.com installation. In the other case you can also work on www.ads-software.com on localhost or else you can host on any servers and can point your domian to the ip. In this case I recommend switchhosts plugin for firefox or similar that makes you not to point the domain name to server, but work like you are developing on existing domain.
