Just read one article and write one sentence about it. That sentence will grow into a paragraph when you add some explanation and examples to support it. Start by writing one sentence to tell me about what an article is about.
Search your school's library database for this: "reality television" "social issues"
"reality television" society
When you have one paragraph about one article, do the same for another article.
Do not try to write the thesis before you have read a few articles and written a few paragraphs! :-)
After you have read and written a little, coming up with an interesting, arguable thesis will be easy.