For a fish in cycle you should cut back on feeding. Either lightly feed daily, or a full feeding every other day.
Water test daily, if you have detectable ammonia or nitrite, do 25% water change. When you are consistently seeing 0ppm ammonia and nitrite and your nitrates are rising then your tank is cycled sufficiently for the fish you have and you can stock some more.
You can speed up the cycling in one of 2 ways.
- Bottled bacteria, eg seachem stability or dr tims one and only.
- A better option is to introduce some filter media from an established aquarium. Perhaps you have a friend who keeps fish?
I would also recommend getting a liquid test kit (eg API master test kit). They are generally more accurate than strips, and as you get 100s of tests from a liquid test kit they are much more cost effective in the long run. I still use test strips as a quick dip and read to see if there is a problem, but if I want to know my water parameters i use a liquid test.
This post gives some more detail on what is going on in your tank.