Hi tag and welcome to the forum.
I do not know that Interpet kits are bad per say, but I certainly have read a lot of threads here where members are either having trouble with them or having trouble interpreting them.
In addition it sounds like you are getting off to a bit of a bad start to your fishless cycling. It should all be much more straight-forward than this. Normally, you should have a set of good test results on your source/tap water, add conditioner to it to remove any chlorine or chloramines and be starting from a well-known starting point. You should have a good test kit you understand and begin testing twice a day. You should have an aquarium log where you always record all your test results and any notes you want to make.
You should take a couple of gallons in a bucket and run the tests as RDD's article says, to establish how many drops or dropper squirts will truly bring your ammonia level up to 4-5ppm and not more. Then when you multiply that and first do it in the tank it is important to test the resulting level and see that it all worked out and the overall newly fishless cycling tank is really sitting there at 4-5ppm (and not 3ppm or 8ppm for example.)
Since you already have the Interpet kit, I would attempt to understand it for now but I would be taking action to try and get a kit that will be easier to use. Many, many of the members here, including me, use the API Freshwater Master Test Kit and find it relatively easy to use with repeatable results. There are also Hagen/Nutrafin Mini-master kits but it can be important to get one that includes the Nitrate test, as not all do apparently.
Once your measurements are easy and reliable, you want to choose whether to make your "daily ammonia add" in the morning or at night. Each can have advantages/disadvantages depending on your household schedule. The point in the day where you add ammonia can be the easier one, without tests if you are in a rush, whereas the other point is where you will want to definately do the tests to see what has happened at the 12 hour mark. At various significant points in the fishless cycling process, knowing whether you've processed ammonia or nitrite within 12 hours is an important result.
Ammonia, Nitrite and pH are the most important things to keep track of frequently. Occasionally, Nitrate is a helpful thing to know but that is a more complicated test and you'll want to minimize the number of times you need to do it.
Hope you can get things sorted out and off to a better start!
~~waterdrop~~
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