Don't make the mistake that so many do by adding TOO much too soon. Right now, you're on the right track with the damsels. Don't add anything else until you tank is completely cycled, and then wait another month after the cycle is over before adding anything new.
You don't say the the size of your tank, so its hard to say what you add next. I just know that you will regret it very much, if you do not go slowly in adding livestock. When you do start adding, add only one specimen at a time, wait again for a couple of weeks to assess the impact of the new addition before adding.