You may find it a good idea to write down your password before you enter it.
By the time you get to confirming your password, you might have forgotten the first one.
A complex password is needed for a site like this.
Check your email. You should have been sent a validation code.
Just go through the Registration/Login process again.
Before you can publish an article, you need to have a blog to publish it in.
Depending on your Browser Settings, you may have to click on the 'Blogs' link on the top menu to get to the blog creation page.
You can call your Blog anything that you like. (within reason)
The same applies with creating articles. Name it something that indicates the content of the article.
Broadly speaking, the content should revolve around politics, current affairs, news, social issues etc.