I have a single installation of Wordpress in my web host and would like it to manage 2 domains or websites. One is for the domain and the other is for its subdomain/s.
dummy example: www.swimming.com and videos.swimming.com
In my limited knowledge, is this where you use the multi-site feature of WordPress?
Another question, is it possible to add that feature later on? I mean, I would have to concentrate first on the main domain and when time comes, I'd focus on the subdomain. So I'm planning to use WordPress without multi-site first and when I'll add a subdomain, that's when I'll switch or add multi-site.
Or do I have to start with multi-site now?