1. Load a picture in your photoshop cs6 or cc. Start playing with the easy tools on the left side of the screen (vertical side icons) such as Text, Eraser, Clone stamp, Gradient (or fill with color) , Cut , Brushes.
Do such things for 2 weeks or a month everytime you have free time and you feel artist. Also on the right side where you see "Layer1" for a text, right-click on it and select Blending Options...click on this and start playing by adding effects to texts such as Shadow, Stroke, Outer Glow (i think these are most important and most used). On the right side of the screen you will see "Styles" . Play with the styles on texts.
2. Time to expand database : Search on google for free fonts, free brushes and free styles and few free plugins. Install the fonts in the Operating System for good , instal brushes, styles in the proper subfolder from photoshop instalation folder.
3. Enjoy your new database and repeat step 1
4. Load a human face or a copyrighted image and learn how to use clone stamp to remove face imperfections or copyrighted text.
5. Oh, you're getting closer to become advanced user. Congratulations ! Time to search for tutorials ,this will help you to achieve perfection . There are many free tutorials but the ones made by pros are not free. To get access to such tutorials for free you have to hunt for a free trial ,see
https://creative.pluralsight.com/11/index.php (former Digital Tutorials) or
https://www.lynda.com/ or any other website with paid subcription with tutorials. For example Lynda.com offers a 10 days free trial . Feel free to register and use this unique chance to access advanced tutorials for free for 10 days.
My first tutorial learned from a pro it was from Digital Tutorials about Complementary Colors
you will need such tutorial to create awesome greeting images, etc. even to decorate your house interior. (there is a scientific research that some colors are looking very good togheter).
Edit : if you want to purchase photoshop but you dont know which one, i say cs6 extended is good even if the cc is newer. The mainly difference is that CC is more based on sharing online images on adobe' servers galeries for showing off (in cloud) , a waste of extra money from my view point. You will be fine with CS6 .
Illustrator is based on vectors working ,not recommended for beginners in graph design.
If you are a student or you have a student friend you can get discount on prices
.
You wont find to buy cs6 extended anymore to buy on adobe website but you can try in your city at the computer shops or from friends for the dvd.