[Closed] opening up a fireplace and moving a door

upstairs fireplace has been blocked up sometime ago.  I want to open it up and make a feature of it.  presume I just chip the plaster off and the infill should be obvious?  it' not going to be put back into use so I plan to close it off, but with a recess.  any gotchas I.should be thinking off?

second q...i want to move.a door 5 inches over in the alcove to.the side of the fireplace so it is central (and can then be hidden) I don't believe it is load bearing.  I'll check in the loft before.i.jave a crack.  for the sake of.5 inches should I just whip out the door frame cut 5 inches off on side and use the brick.to infill.the other side?  do.i need to worry about bracing?  again any gotchas?  this door has a repaired crack above it, so may not have a lintel but its been okay since the 30s.