The next thing we need to do is to grab Brush Tool from the tool panel. You can also press Shift+B again and again until it comes as keyboard shortcut. Set the hardness in the range of 50-60%. Now if we brush over any area with black color than it will deselect that particular area on the other hand if we brush any area with white area than Photoshop will select that area. So change your foreground color to black or you can press D as keyboard shortcut. Now brush over the area which you don’t want to be selected. Just brush over it roughly.
After brushing over my image I got this result. You can see that the brushing is not perfect.