A scared cat must have somewhere to hide. Limiting the hiding places available is fine and a good idea – you don’t want the kitten to be able to get into someplace that’s dangerous, somewhere you can’t get them out of if that’s for some reason essential, or somewhere you can’t peer at them to make sure they look OK. But removing all hiding places is cruel and may itself be dangerous – some cats, if they can’t hide, will panic and start beating themselves against walls and windows trying to escape.
Under a bed usually works pretty well; or provide a box with a towel in it, and an opening big enough for kitten to get in and out and for you to peer into, with a flashlight if necessary.
Do not drag a scared cat out of its hiding place unless this is absolutely necessary (to give medication their lives are at risk without, or if the house is on fire, or they haven’t eaten in multiple days and you’d better take them to the vet and find out why.) You want the cat to start feeling secure. They’ll come out on their own; probably, to start with, in the middle of the night or when you’re not there.
It’s not necessary to put a kitten in the pan to housetrain it. Just make sure the pan is the only thing in the room they can dig in.
When you bring fresh food in, put the food just outside wherever the kit’s hiding, and go sit very still on the far side of the room for ten or fifteen minutes. If the kit doesn’t come out to eat, go away and try again later. If the kit does come out to eat but doesn’t come over to you, sit still where you are; and the next time, sit a little closer. And so on.
You’ll have kitten all over you before too long if you don’t rush. It gets boring hiding under the bed (or in the box, or wherever.)
– a newly arrived cat may not want to play yet. Any new cat (etc…) should have a vet visit as soon as you can schedule one; but presuming that doesn’t turn up anything serious, if the kit’s eating anything at all don’t worry about it to start with. In addition to being afraid in a new place, if the kit’s a rescue, sometimes rescued cats are exhausted from stress and prior starvation and need to rest and recover.
ETA: That is a very pretty cat. And yes, he’s scared right now.