Hello aspirant,
Yes, you can learn Graphic Design course and make it as your part time job as well with no worries. You can learn anything and add it to your resume to make it look more presentable and informative also. But while giving time to learning and part time job, make sure you take care of your engineering studies as well and well enough to handle both the studies as well as the part time job.
Hope, this answer helps you.
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile