Test water parameters every day. Your target should be to keep ammonia + nitrite below 0.5ppm combined. If its 0.5ppm combined do 25% water change. If it gets to 1ppm combined, 50% water change. This might mean 50% daily water changes, i don't know what your parameters are or how much ammonia your aquarium is producing, so i cant you tell how much/how many water changes to do.
What are your current water parameters?
While cycling feed lightly, only enough your fish eat in 1 minute daily or in 2 minutes every other day.
When you are consistently seeing 0ppm ammonia and nitrite daily you are cycled for your current stocking. This could take several weeks. Dont add more fish until you are cycled for what you currently have.
Biological boosters like Seachem Stability or Dr Tims one and only might speed things up, but are hit and miss whether they work. The best way to speed up your cycle process is to introduce some filter media from an established tank. Perhaps you have a friend that keeps fish who could let you have some?
Edit: use a water conditioner whenever you change water. Prime is a good conditioner.