Restrain yourself from watering. The cutting has not yet formed good roots. I usually wait for at least one good leaf to be fully open before I resume active watering. Leaf claws like the one you see does not count yet.
Just find a warm, bright light area, or maybe an area that gets more morning sun, and leave it there, do not keep moving it around. Usually, once the plant has formed good leaves, and watering is resumed, that is the time i can move it to more direct sun, since it can now take in more moisture for its growing needs. Till then, got to coax the cutting to form roots first, otherwise it will just be a slow rotting damage at the base that spreads throughout the cutting.
Ideally, next time, use cacti mix and add lots of pumice or perlite to it, to make it gritty and well draining. Do not just get soil/sand from the street, since you cannot guarantee it being free of toxins.
