It is pretty easy to get started. There is a free account or you can sign up for one of the two paid plans for a few dollars a month if you want to have a classroom account. Teacher moderation is included in the paid plans.
Once you create a timeline, by entering the name and a category if you choose, you click on Add Event, enter a date and name of the event. Then you can also add more info and a link as well as a photo all on the same form. You must have photos saved on your computer ahead of time so you can upload it to your gallery, however. Then click create event and the form will close and a tag will be posted on your timeline. Just repeat for as many events as you have and then your timeline will be done. It is automatically saved to your dashboard.
Your visually enhanced timeline can be viewed in full screen. Just click on any event and a page will open with the additional information about the event. It can also be viewed in text view, just by clicking on Text View at the top of the page. You will see a table with all of the information in chronological order.
Here is an example of a timeline, the one I created for my technology class on the history of communication technology devices. It can be embedded in your HTML sites as well! Enjoy.