Considering the size I would suggest to do this https://ball-pythons.net/forums/show...-hatchling-101 to a T until the animal reaches 200/250 grams. If the size is accurate having doubts considering your pics. If bigger the enclosure size will depends on the weight.
Do not feed 2 to 3 adult mice to a 46 grams snake if the snake is really 46 grams which I doubt given the size of your hand and the animal's body the prey would be smaller and you do not want to feed a starved animals too many preys.
First thing fing out how much this animal's weight. Second setup a proper enclosure get rid of the sand, have a heat pad, tight identical hides, digital thermometers, heat pad and thermostat.
Do not feed too much at once a neglected animal that has been severly underfed should be fed one appropriate size prey once every 5 to 7 days. (that's where knowing the weight and size is important)