Developing my self portrait work. Pixel art style

I am going to try to produce a piece similar to Alejandro Rene Hernandez's work in the style of pixel art. I am using a photo of myself to work from.

I duplicated the layer and renamed it photo and added a transparent layer which I will paint on to and have started by selecting the background with the magic wand tool and painted the background on the transparent layer

I have added a grid, changed the settings to snap to and adjusted the size so that I can use the polygon select tool to select areas of my face and colour them in

I have completed the outline layer

I then added the white layer working with the same method

Continuing with this method I have gotten this far in my piece

I have completed my pixel art piece