If you want to do a fishless cycle you really need to be dosing ammonia. If you dont add ammonia there is no food for the bacteria to consume and grow. This is usually done in the form of an ammonium chloride product specifically for aquarium cycling. Dr Tims Ammonium chloride is the most common, but there are others. You can use pure ammonia, most commonly a really cheap cleaners bleach, but you have to make sure its pure, no perfumes, nothing. Check the label carefully if you go down that route.
You will also need a test kit, preferably a liquid test kit that will test for pH, ammonia, nitrite, and nitrate. Water conditioner if you havent already added it to your aquarium water. And i would recommend a biological booster, like Seachem Stability.
There is a useful guide that people get pointed to on this forum. Have a read through that.
My method though. If your water isnt already conditioned add water conditioner. Then dose ammonia to 4ppm. Be careful doing this as high levels (above 6ppm) will kill off the bacteria you are trying to grow. Read the instructions if you are using an ammonium chloride product and double check testing the amount in a bucket and multiply up to your tank size. Possibly go up in increments of 1ppm to be sure.
Once your ammonia is at 4ppm, then add your biological booster, with additional dosages the following day etc as manufacturers instructions. Then test everyday for ammonia and nitrite. Might take a few days or a week, but you should see your ammonia start to drop and nitrite start to rise. Continue testing daily, and start to test for nitrate as well when you begin to see nitrite. If your ammonia drops to 1ppm or below, top up with ammonia till you get upto 2ppm. If your nitrites are too high to read on your test, do a 50% water change before you dose ammonia back up. After a while (maybe 4 or 5 weeks) you will see 0ppm ammonia and nitrites 24 hours after dosing ammonia and your nitrates will be increasing. This is when your aquarium is cycled and you can start stocking with fish.
When asking questions and looking online for help, expect to get different answers from everywhere and everyone. There is more than one way to skin a cat, if the advice is from someone in the hobby, it is based on their experience and it is what works for them, and you will find what works for you as well.