I've created a lesson on https://qa.moodledemo.net/. It is very easy to create first page but that an everage user gets confused. There is a page on a list of created lesson element and a drop down on the right. There is no way to create a new page as the element Add new page on dropdown is allready selected. I guess it would be better to have an option "Select action ..." or just "Select ..." in the dropdown box as the default.