welcome to photoshop

original

realistic

I wanted the reds to pop more and create a more red look in the brink.

first layer - adjusted brightness (down) and saturation (up)

second layer- adjusted hue (down) and saturation (up slightly)

stylized

I went for a comic book/cartoon look.

first layer - adjusted posterization just slightly

second layer - increased both the brightness and saturation

third layer - added the colors using a preset gradient map with blue, red and yellow but then adjusted the map to add the amount of those colors that I wanted