To boost your further posts a little you may visit steemits homepage and look at the full list of tags: https://steemit.com/tags I suggest ordering them accourding to payouts and then choose the fitting tags accourding to the most payouts.

You made a wise choice by using #art as your first tag but you also could have taken #photography :)

I also recommend having a look at bescouted.com, a photocommunity, that is connected with steemit. If you publish a photography on bescouted.com it is published on steemit aswell. I recommend publishing it on bescouted and then adding a little text on steemit to make it more interesting.

There are people on bescouted, that are not on steemit. So by publishing your photographies on bescouted you enhance your chances of upvotes.

I hope I could help you a little with these tips =)