i think it would add a lot to the sig if u made the background a crowd in a stadium. it looks pretty good since ur so new. keep it up, stick to those tuts! (rhyme not intended)
They are not clouds in the backround, they are the crowd, they're just blurred and that's how they was in the original see:
Well, you can add a random crowd stock and lower the opacity a bit or change the color, whatever makes it fit with Ronaldo. And then erase the parts that cover Ronaldo.