If you’re planning on keeping corals (and especially in such a small tank where things can change very rapidly) I would really urge you to get your own test kits. I wouldn’t worry about getting ammonia or nitrite test kits, you can either wait a couple more weeks or have the lfs teat to verifying that your tank is processing ammonia, but going forward (and ethically you really should purchase these before you purchase any corals) you’ll need to be able to test for Alkalinity, Phosphates, Nitrates, Calcium, PH, and Magnesium (avoid API test kits, Salifert, Red Sea, Nyos, Aquaforest, Tropic Marin, and Hanna are all good brands- Ideally you want the test kit with the best resolution, meaning the most specific test kit (ie one that shows 8.1, 8.2, 8.3, etc, instead of 8, 9, 10, etc).