Well, as it it might seem like good idea, I don't see any problem with "no-limit" challenge. The sooner you learn that the world is not fair and that you have to always give it maximum to get some progress, the better it will be. Don't compare your work only with someone of the same age, always compare it with the best ones and study it. This way you'll learn and practice. Not to mention that age doesn't matter here and the software really doesn't mean anything. People create great things in Blender while others suck at Maya and it doesn't really help them that they have expensive software.