First you will need to access your website editor. If you don't know how to do so, you can read this article
Next, you will need to access your front page editor. If you don't now how to do so, you can read this article
Next, you will need to know how to add widgets to your website. If you don't know how to do so, you can read this article
Lastly you will need to add testimonials to your website. If you don't know how to do so, you can read this article
Once you have accessed the front page editor of your website, you will select the "+Add Widget" button and select "Testimonials"
Once you’ve selected the Testimonials widget you can move it to your desired location.
After you have moved the Testimonials widget to your desired location, you will hover over the Testimonials widget and select “Edit”
From here a new window will pop up similar to the image below
Now you will have the option to either have the widget alternate between testimonials with the “Random” option or have the widget show specific testimonials.
If you choose to have the widget show specific testimonials, you will select “Manual.” After selecting “Manual” you will select which testimonials you would like to have showing.
After you have edited the testimonial widget to your liking, you will click the “Done” button in the bottom right.
To finalize the changes, on the right side of the webpage you will need to click the “Update” button to complete the changes.