Everything in Beautiful.AI gets created in the container of a 'presentation'. By default, a Title slide is the first slide, but you can just delete it after you create a second slide.
To create a slide, click on New Presentation:
On the right-hand side of the slide, click the Add Slide icon to launch the Template library:
Select the template you want from the menu or type in the name or item in the search bar. The slide will automatically launch once selected:
Click Set Words to fill in the Word Cloud: