Cloud "dream" effect around edges
I am trying to mimic the below image on a portrait to be used at a funeral. Can anyone help with how to create this cloud-like effect where the image fades out into white? I have searched everywhere and not having much success, even the ole' chatgpt wasn't useful.

Where I am stuck....I used the adobe preset to convert my image to watercolor and cleaned it up from there. The issue with the adobe preset is that it just sticks a background on it, and creates somewhat hard lines that do not cleanly fade into white. It is being printed on a white canvas, hence the reason I need it to fade into white before it gets to the edges of the canvas. Thanks!
