Did I do the new tank okay?

I’m worried maybe I didn’t do it right or maybe I shocked the snails or something…? Idk I forgot about the heater until I took the water temp and it was 69.9F and so I went right out and got a heater and set it to 73F. Also why do some keep going above the water? Do they not like their water? I use distilled water and I use stress drops and quick start before I had put them in. Will they be okay? Am I feeding them too much? Or to less? They were in a normal fish tank sense I only had 1 snail in with my fish and the fish passed and then boom baby snails and now that most are big enough I got them a new tank. But I REALLY want them to thrive… please tell me I’m doing it okay..