You can then edit the PSD file like a normal image in Canva by changing the color, adjusting your lighting, and anything else you deem necessary. You can't export your file from Canva as a PSD.

You do not need to use Photoshop to edit PSD files as long as you have this online tool. Not only PSD files, but also you can edit AI, XD, SKETCH, PDF, RAW, and XCF files.