I've seen several new names on the updating of the topics wiki where the person seems to have been scared off. Suggestion:
1) Enter "infant" in the search box
2) Click on the History tab in the upper right
3) Highlights show you what was changed most recently - this tells you "how to do it"
4) Choose a topic of interest to you and enter it into the search box ...don't try to create a new topic on your first try
5) Enter a Biblical reference or alternative name as your first attempt.
6) Click the Preview box below the input box to see the effect of your change
7) Click on the save box
8) Click on the History tab to see how your change is highlighted.
You are now in business - as you get more confidence, start adding web links and eventually reading lists.