I should have mentioned that the blade normally will cut into the rub surface by the amount the blade projects during the first few strokes of the plane. The plane ultimately registers on that bottom edge part of the sole that does not have any blade. That means that you have to be sure to let the plane ride on the plane side which is against the shooting board and the edge of the rub surface remaining. just don’t tip the plane up during the stroke or you lose your references.
Ok I will shut up now. Have fun.