The basic structure of a prompt should look something like this:
style (Rembrandt style) Subject (boy) Descriptive Details (around 9 years old, blue eyes, fair skin, light brown hair, lower east side, wearing a peddler hat etc) (what year was the picture taken in) (lighting, specific colors, time of day etc) (environment etc)Parameters (the --ar, which stands for aspect ratio, which will be your size of the image, we write it with two dashes first --ar 16:9, --ar 3:2 etc) (and then you can put in your version --v4 or --v5 etc)
So the real basic structure would be: style, subject, descriptive details, parameters