Once you're done Convert it to a Smart Object by Right-clicking on the Layer > Convert to Smart Object... Doing this will not only let us retain the original quality of the image as I stated before, but it will also let us re-adjust future edits we'll make with no problem.

Step 6

After that, place it to your canvas, re-size it to 65% then position it as shown below.

Next go to Filter>Sharpen> Sharpen.

Step 7

The man's arm's are pretty bright compared to the rest of his upper body while his face is a bit dark because of the original image's lighting but are going to fix that. To start off, double-click on the Smart Object Icon located on the bottom right corner of the Image Thumbnail. A window will pop-out just hit 'Ok'. Doing so will open us to a separate canvas filled only with that layer.

We'll start by lighting his face. But before doing so, set your Foreground Color to #C0C0C0. Now grab your Brush Tool (located on the Layers Panel |or| use the Keyboard Shortcut B), with the Hardness at 0% and Brush Opacity (take note, the brush opacity not the layer) at around 40-55%, brush over his face a couple of times.

Then Set the Blend Mode of the layer to Overlay and Create a Clipping Mask (Right-Click > Create a Clipping Mask...)

Step 8

Now we'll move onto his arms. First, using either the Pen Tool or the Lasso Tool, make a selection from his shoulder until his wrists. If you are using the Pen Tool, don't forget to convert the Path you made into a Selection. It doesn't really need to be precise, just enough to cover the bright parts. (I highlighted the parts I selected so you could see them...)

Click on the Adjustments Layer Icon> Curves. Adjust it like so:

Click on the Adjustments Layer Icon> Curves. Adjust it like so:

Re-select the selection we just made (Hold Ctrl then Click on the Layer Mask of the Curves).

Click on the Adjustments Layer Icon> Levels. Adjust it like so:

After that Save the .psb file by going to File > Save |or| press Ctrl + S

Step 9

Leave the .psb file open as you might need to re-adjust some settings later on. Go back to our main canvas, now we will cover the bottom part of the image. Change your Foreground Color to #0c1418, create a new layer and name it 'Brush' using the Brush Tool (Hardness at 0%, Brush Opacity at 100%, with the size of your choice), Brush over the bottom part of the canvas, try making an upside-down U or a triangle shape with a not-so-pointy end or a half circle.