I took this picture and edited it a little in PSS, I need to sharpen the painting, but can't find the masking tool in order to select it :(

what do you think?

 

I have more pictures to edit, just want to know I'm in the right direction before I continue
Taking photos of my art in order to appeal to mothers who love nature, love their kids, live in the city, and likes to decorate their house with strong meaningful art