There are tons of fish you can add to a new aquarium that are hardy. Talk to some folks at your LFS. However, as others have mentioned, it is REALLY important to wait until your cycle has completed before adding livestock. Otherwise it is a sacrifice... I never like the idea of using live fish to start/complete a cycle. There is tons of info on the forum about tank cycles and it really depends on what you'd like to do. Some say a shrimp, others will tell you live rock, some will tell you throw damsels in. I have had success using live rock and being patient. This is probably the hardest thing to do now that you have everything going. This is also the reason a lot of people get in the hobby, then instantly shut down there tank. They don't wait for a cycle to complete, add a bunch of livestock at once. They go through the dramatic change of levels, get stressed, and then die. Then you see them posting their entire setup on craiglist or eBay...
Patients is a virtue! Take your time, do things right the first time, and you will be rewarded with an awesome tank!
Welcome to the hobby, if you have any questions, feel free to reach out!
