"A professional is a member of a profession or any person who earns their living from a specified professional activity."
you have to be paid for doing it... no other criteria needed =P
1 your bubbles(your text should be in the middle and the bubbles are a bit too big or too small for some of the text, make sure your bubbles are the right side and your text is properly readable and not cramped)
2 line weight(your lines are deadlines there is no size variation or nothing in them, try making the lines a bit thicker or thinner in parts, simple example: thiker where shadows and thinner where light hits)
hope these tips help you and here's to your future endeavors