Canva has hundreds of thousands of templates and millions of photos. They look great and appear better than many of the ubiquitous free stuff. But they can look a bit generic. It’s again because of the rigid nature of Canva.
Creating something distinctive is a challenge. You might find more unique templates and photos on design resource sites such as Freepik and Adobe Stock.
But you get a lot of quality free images and premium ones for a small price of $12.95 per month (less when paid annually), so Canva is more affordable.
Alternatively, you can replace the placeholder content with your own images or text (or add additional pictures and copy).
To add an image, you can either search for an element from Canva’s ‘elements’ library (hundreds of thousands are available, and I’ve yet to come across a search phrase that isn’t adequately catered for).
You just click on an element to add it to your design, and you can resize it easily to suit your purposes.