Create simple websites for free. Just click "Start Now" and sign-up for free. Then select a theme and start editing. If you are prompted to register a domain, exit out of the window. You do not need to pay for a domain. When you publish your site, you will have the option to use a free domain!
Highly recommended. Reasons: Ease of use; free; embed Timelines into web pages.

Create simple websites for free. Register and create a site. Select a template or work from scratch.
Highly recommended. Reasons: Ease of use; free; embed timeline; templates available.

Create complex websites for free.
Not recommended for beginners. Reasons: Difficult to use; does not allow media embedding outside their selections.