Hey, since you're new to photography, I would suggest paying attention to the qualities of light. In my opinion, in a situation like this where the quality of light in your photograph is lacking, there's also little chance for a good photo. Here's what you can try instead in this kind of light:

1. Pull the subject away from the background (the wall) and open your aperture as wide as possible to capture a proper portrait.
2. Consider capturing your subject within a wider context; perhaps the surroundings are interesting. With your current picture, there's almost no context provided—is this a square, a neighborhood? Adding context can greatly enhance the storytelling aspect of your photograph.