Fishless Cycling

You have a reading on nitrate. It is definitely making progress now.

Make sure you add more ammonia once it is too low to keep the bacteria well fed. So they will continue multiplying. Since you have seen nitrate, it won't be long now. My estimation is a week tops before your aquarium is fully cycled. It might be quicker or slower depends on the water temperature, availability of oxygen in the water, etc.

Keep us updated.