One of the easiest achievements in the game. To earn this achievement, which is called "Student", you must play and complete any training session in Tutorial mode.
To find the Tutorial mode, on the main menu, select Dojo. It should be the fourth option from the top. The next screen then shows three options; Tutorial, Command Training, and Free Training. For the purpose of this solution, go ahead and select Tutorial.
The next menu shows a list of tutorials. To earn this one very quickly, just select the first one, which is Dashing. Then select any character you wish to play as; it doesn't matter who it is. Once the tutorial comes on, it will teach you the basics of dashing. For the purpose of earning this solution, you must perform a total of five forward dashes and five back dashes.
To perform a dash, you must tap either the left or right, on either the directional pad or on the left analog stick, twice in rapid succession. If performed correctly, your chosen fighter will do a short dash that's either forwards or backwards, depending on what you decide.
Once it is done explaining to you the tutorial of a dash, it is your turn to perform it. Just do one forward and then one back dash, then repeat those two moves four more times, in rapid succession. Once you accomplish this feat, the tutorial ends and the achievement is unlocked. Very easy, isn't it?
Have fun and good luck!