Natural Photo Retouch & Color Correction

I need a single photo polished while keeping it exactly the same size and resolution I supplied. The priorities are balanced, true-to-life colour correction and a natural-looking retouch—no over-smoothing or artificial effects... (Budget: $10 - $30 USD, Jobs: Digital Art, Graphic Design, Image Processing, Image Upscaling, Photo Editing, Photoshop, Photoshop Design, Visual Design)