Ok so this is the thing... I am not to experimented or so but I can give you some opinions.
First, I would've made the background something purple to match the lines on his face. It's important to keep the same chromatic.
Second, the image is not that qualitative. I know it sucks to find some good quality pics sometimes as I've had problems with that myself.
Third: the text. First, it's kinda hard to read. Always try to look for clean fonts and as well, keep the chromatic to match the whole.
This is what I can tell you from what I've learnt myself.
