I don't know why, but I'm not keen on Canva. So in my quest for an alternative I just stumbled across https://www.photopea.com/ ... pretty handy!
If you try it, let me know what you think 🙂
I have tried it previously, and basically, it mimics Photoshop, so if anybody is familiar with that, photopea follows the same processes, but for free!
For an AI option, you can also try https://chat.qwen.ai/
Here's an example where I created the original image with Imagen, and asked Qwen to change the breed of dog.