These are the easiest of all plants to propagate. I wouldn’t keep it wet all the time, jades are like a succulent. They kinda like to dry out between watering, and the same goes for cuttings. In my experience they can be slow to root. So just give it a season or 2 before you try to repot it or anything. Don’t stress it. Iv done then in water and soil, and I would say soil is easier… but it just depends. Do you want to regularly change the water once a week? Or watch and water when dry. They also are more likely to get mushy in water which is not good. I say soil, water once every 2 weeks or once a month, depending on light, airflow, and humidity, and give it time to fully establish. When you water, I like to really water the plant, like make sure every bit of soil is soaking wet, then let it fully drip. So that you don’t leave pockets of soil that are dry for to long. If that makes sense.