Hello Irene,
If you will type up a few sentences (or paragraphs) and e-mail them to us of what you want to add, one of us can figure out how to edit the article for you and work some of your information into it.
This is a collaborative effort, and nobody says everyone has to do every piece of it by themselves ...
Another way to do this would be to go to the article Talk Page, then type in your suggestions for the information that needs to be added. Then, the editors who are familiar with the topic or watching the article can use your input to develop the article.
Cheers,
Kristin