In addition to what has already been said, personally I use auto-home and then move the hot end to the middle of the bed (On my printer, after auto-home it is the ABL sensor that is in the middle of the bed) and then set the Z position to 0mm.
Then I go change the Z Offset setting until it touches the bed with the paper like you did.
In theory I suppose the result should be the same but it might be worth a try if what has been already suggested by u/p1mrx is not your problem.
To add a little bit to this, check if the motor gets hot. If it's not hot then you probably don't need to worry.