To add this block to a post or page, click the black plus sign and type in “little category” in the search field to find it.
To edit the block, see the settings in the right-hand sidebar. If you need more space, click the pencil icon on the block to switch to Edit Mode. While in Edit Mode, the settings move from the sidebar to the Block Editor. Click the eye icon to switch it back.
For each testimonial, upload a photo, add a name, and type some text in the settings window. You can add more testimonials by clicking the Add Testimonial button.
You can also change the order. First, to make things easier, click the top left-hand arrow to collapse each testimonial. Next, click and hold to drag the item into a different order.