If you're going into the challenge with the idea to win it then I'll advise you desist from the temptation but if you are going with the mindset of sharpening your knowledge on trading then it's a good way to go in broadening your scope about trading. Prop firm challenge could be another avenue newbies who have the money to risk could use to build confidence and try to master and harness a few trading skills.

But if you don't have the money to risk then don't sweat it, just stay consistent with demo trading you could still develop some trading skills through demo at the cost of no real financial loss. Some of us that trades started with demo and some self research work too.