First of all, I apologise if there's a thread like this, but I couldn't find one that helped in my particular problem.
I took a screenshot of an anime, and was thinking of turning it into a wallpaper. But there were two things I want to change, but don't know how: removing some text which covers parts of the picture, and improving the colour quality of the picture itself.
For the text, I figured that I should clone stamp it out. But for improving the quality, I read about tracing and colouring, but there were too many colours in each part for me to do it properly. So if anyone can help me, I'd gladly like some advice.