I've edited several articles, and created some. I just went ahead, created an account, and started trying to contribute.
I did have problems in the Spanish language Wikipedia, I created a page for the Finance Minister, and it got deleted twice for "self-promotion" until I managed to convince the guy that the person was, in fact, a relevant political figure in my country.
I also created and modified pages on the English Wikipedia, and I haven't had problems yet, for example the last one I created was the page of the owner of the company I work for (one of the world's richest):
I've edited several articles, and created some. I just went ahead, created an account, and started trying to contribute.
I did have problems in the Spanish language Wikipedia, I created a page for the Finance Minister, and it got deleted twice for "self-promotion" until I managed to convince the guy that the person was, in fact, a relevant political figure in my country.
http://es.wikipedia.org/wiki/Fernando_Lorenzo
I also created and modified pages on the English Wikipedia, and I haven't had problems yet, for example the last one I created was the page of the owner of the company I work for (one of the world's richest):
http://en.wikipedia.org/wiki/Jayme_Garfinkel
I don't have a good knowledge of Wikipedia, I just copy a page I think is similar to the one I want to create and use it as a start.