How much you'll earn here basically depends on the total number of impressions your hubs have and your CPM. As I see it, writing about certain subjects such as technology, health,and product reviews can lead to a better CPM. I read your profile and it implies that you're a fan of creative writing. Unless you're poems are really good, don't expect them to earn much. Though I love reading short stories and poems here in Hubpages, we can't deny the truth that they don't rank well in search engines. It's up to you though. If you're here to improve your craft and share it to us, go ahead! I'll surely be among the many who'll look forward to your works. But if your main goal is to make money here, try to come up with informative hubs and target keyword phrases with high search engine views and low competition. Welcome to Hubpages and good luck!