Is there a reason you went for the 2.5 gallon tank? I only ask because you could get a 5 gallon for about the same price. It would need to be cycled though because 50% and 100% water changes in a 5 gallon once a week could become a pain. Cycling is basically a process to get colonies of good bacteria established in the tank so that the ammonia that the fish produces does not get high enough to kill the fish. Here is some more information about it: http://www.tropicalfishkeeping.com/f...m-cycle-38617/
If you do go with the 2.5 gallon, there really isn't a point to cycling it just as long as you do frequent water changes. I would say two 25-50% and one 100% water change a week is good. Someone else with more experience will give you more advice on that though! A gravel vacuum will come in handy with the water changes.
I don't see a water conditioner on your list. Every time you do a water change you will want to add conditioner to dechlorinate the water. SeaChem Prime is highly recommended and you only need two drops per gallon so the smallest bottle will be fine.
I have heard pretty much everyone on the forum say that the water test trips are not accurate enough and that you will want a liquid test kit instead. The downside is that they are in some cases double the price of the strips, but they are more reliable. The API Freshwater Master Test Kit is a good one and Walmart is the cheapest place to get it.
Other than those things, you look like you are well on your way. Good luck!