Your bathroom faucet’s spout should be tightened by hand to the point that it is difficult to turn. You shouldn’t force it any further, as this could damage the pipe.
If this leaves the tap facing the wrong way (upwards or sideways), you should move it back counterclockwise to correct its alignment. Avoid turning it clockwise, even if it’s only slightly. Make sure you use plumber’s tape on the threads to prevent leaks.