Hey Benjam, welcome to the forum. I'm new as well. You'll find the support on this site amazing; the community here is responsive and will inform you of anything you need to know as stated in this post. Unfortunately, I cannot give the greatest advice compared to some of the more experienced amphibian owners here. All I can say is give them a couple of days to settle into their new big terrarium and they should willingly get into the water dish if need be. I read somewhere on this forum that if you cover up 3 sides of the terrarium with black background material excluding the front view, they find it a little easier to get used to their surroundings. How did you sterilize the playsand? Recommended substrate for frogs/toads is coconut fiber (Sold in bricks or pre-made bags) for burrowing and easy digestion. I wouldn't recommend sand due to impaction risk if you are feeding your toads directly on the substrate.