Have you read the New Member How-to pages, Janet? They are a huge help. Also, make sure you have valid sources for any profile you create or anything you add to an existing profile. This is especially important as we go back in time and sources may not be as accessible. We do not consider an unsourced tree from another site or from personal files a source here at WikiTree.
You may want to begin adding more immediate family to the tree and work on sourcing those profiles before you jump into older existing profiles. That will give you some practice on WikiTree editing and on researching.
If you need help with a particular profile you're working on, don't hesitate to ask. Always include a link to the profile if you can as it helps others narrow their focus when lending a hand.