Definitely join an SEO group to find out specifics - but you need a banner, and your announcement should be full of keywords (this is how Google indexes you)! Also fill up your policies page! What if the art arrives damaged? What if it gets lost in the mail? HOW is being sent? UPS? Fedex? Is it insured?
(Again, join an SEO group - but here are the basics) Your titles should be longer, full of keywords! More the merrier, because it gives you more options to be found in searches! Then repeat those keyword PHRASES in your tags. Don't use single words, those are useless on etsy!
Descriptions: Consider 10 questions your customer may want to know about your product. Dimensions, colors, materials, process etc! Then write it out in a paragraph or two. Your description should be written as if there is NO picture. And your pictures should be taken as if there is no description! Consider a further away picture over a couch so people can visualize it in their home!
Finally, add lots of items! Especially in the beginning, add a little of every style you do! You will be able to find your niche on Etsy soon enough! Goodluck!