Not purchased photoshop some free alternative to try are GIMP , Seashore , Pixlr PicMonkey open source software free of cost.
Open Source free Photoshop alternative list :
SumoPaint Website : http://www.sumopaint.com/home/ Sumo Paint is an online image editor, without need to install anything to your device. It's the most versatile photo editor and painting application that works in a browser. You can open and save images from your hard drive or save it to cloud.http://www.chocoflop.com/
GIMP Website : http://www.gimp.org/ GIMP is a cross-platform image editor accessible for GNU/Linux, OS X, Windows and more operating systems. It is free software, you can change edit update its source code and issue your changes.Whether you are a web designer, graphic designer, photographer, animator, illustrator , GIMP provides you with sophisticated tools to get your job done.