If you use Photoshop CC 2019 try to use Select Subject option first Just open your image, press W on your keyboard and use Large Button Select Subject on top menu If selection apperares just fine tune it using Select and Mask Command - buton also visible on top menu Try tu use Shift Edges, Smooth, Radius sliders to adjust selection Then use CTRL/Cmd + J command to move selected areas - into a new layer Now you can add any new background or close original using Eye buton in layers palette
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