@cleo_san Once you have your site hosted through a host that's compatible with wordpress, you should be able to install it directly to your site without having to download anything.
Here's a screenshot from my dashboard on my bluehost account:
There's an "install wordpress" button built right in, and if I recall correctly they basically install it for you, no downloading any files to your own server or anything. I don't have any experience using wordpress with other hosts, but bluehost makes it simple and they had the best price when I was looking at hosts, so I'd recommend them.
@Shanny8 I'd look at other people's comic sites to see what they've done and get ideas. You can always start with the bare minimum and add more as the mood strikes you. I don't have a cast ;page yet because I haven't had the time, even though I know that's something I want to have eventually. Your website can be a process, and doesn't have to be completely finished right away! You can always keep improving it.
EDIT: @cleo_san Okay I think maybe I misunderstood your question but I think I get what you're talking about now. Are you asking if you can make a site with wordpress offline, before buying a domain and having it live on the internet? Just to sort of test it out before you spend money? As far as I know, you can't, I could be wrong though. That would be a nice feature to have!