Of course yes you are so much allowed to showcase your art here on the forum. Do not forget that there are real people here and as a result of that, someone might even get attracted to your work, like or even find interest in it which can lead to you getting a private message from them. I'll advise anyone to post even about his or her art if the OP has a minimal of Jr member, he should even add photos because this forum is just more than discussion but more like a global market. You can get connected than you'd even expect.