If what you read online was a schedule for watering your plant, that's not helpful because so many factors can affect the rate at which any particular plant needs more water, or more precisely, the soil needs more water so there is some available at all times for the roots to deliver to the foliage.
Using the clay pot is good because the roots can access oxygen all around the root ball, not just at the soil surface like in a plastic pot. With that in mind, there is no need to worry about adding too much water unless there is a drip tray that is always full of water. Rotting roots occur when moist soil has no air in it and the clay pot eliminates almost all risk of rotting roots, nothing is foolproof so we can't say 100%. Clay also has a visual advantage of turning a lighter color when the soil is too dry. If you see that, add water.
There is a huge difference between a plant surviving an adverse experience, vs. how one should care for a plant that they want to appear as a robust, vigorous specimen. For the latter, don't let the soil get literally all the way dry.
After 3 years, I would encourage you to think about repotting. Sans grow large, rhizomatous roots and if they run out of room to keep growing, the foliage produced can suffer, and the roots can become unhealthy if they are creating too much pressure - or just break the pot if the growth is vigorous enough. Your plant doesn't look in that category at the moment, but I believe it could be in a few months if it has enough space for roots to grow, moisture in the soil, and plenty of light near a window.
Sans are so easy to repot, should you decide that you want to do it. I use a combination of light digging and pulling to remove everything, knock off the old soil, remove any parts that don't look worth keeping, and put back in the pot with new soil.
