Photoshop 2020 Question

@Girocast, you are welcome. No, I am retired and enjoy having almost no responsibilities. I closed my photography business last year.

I opened your image in Photoshop. It is way to narrow to fit in 9:16 aspect ratio. 9:16 cuts the person off at the thighs if his head is kept in the crop. You need a lot more width in the original image. Can you ask for a version of the image that is in 9:16 aspect ration to begin with?

When you have a very tall image (referred to as portrait orientation) and you want to change it to a horizontal image (landscape orientation), you can either crop out content from the tall image or scale down the original image and add background or whatever else in the extra space. Since you said you don't want the feet or head cut off, you could add background color to the rest of the image. One way to resize the image is to use the crop tool--even when you want to add canvas (which might sound counterintuitive). If you select the Crop tool and change the Aspect Ration to 16:9 (it sounds like you got this far), then you can hold down the Shift key to constrain that ratio while you expand the canvas. If snap is turned on (View >  Snap and View > Snap To > Document Bounds), then the Crop tool will snap when you get to the top edge when you drag one corner to the top and then the bottom edge when you drag the other corner to the bottom. Now that its aspect ratio is set, you can make a new layer and drag it below the image. Sample the background color from the image and use it to fill the bottom layer.