Velojet , I've made the blog in C2 , but can't figure out the rest ...
Hmmm. C2 wouldn't have been my first choice as a blog platform. WordPress (e.g.) gives you much more than (I'm guessing) you could give yourself. Still, congrats on your initiative.
You now need to register your own domain and sign up with a web hosting provider, so you can upload your exported C2 files and make your blog publicly available.
A colleague in the UK uses Simba Hosting and is very happy with them, but others in the UK are probably better placed to advise you about a choice of provider.