Well I hope you understand this is highly illegal and I will be forced to report you to national and international authorities at once! Clearly J/K. Of course you could use something like that. These are more a place for beginners to practice, then a place to sell or promote products. As long as you participating with the intention of practice, you can use what ever method you deem fit.
As for originality, do not over stress about that because I will be interested in asking more questions about this after I see what you make. Good Luck!