Any help would be great

OMG so I have been putting in application after application and today I received an email from the mail service.... So... The position that I would be filling first is a temporary one... And it requires to drive my own vehicle fine... No problem... But... In the states.... We drive on the left and I would be delivering the mail on the right... So... A little different yes... But I'm willing to try anything... So.... Has anyone worked in the mail service and if you have or do... How big of a change was it for you to drive on the opposite side... I'm just excited and nervous and a little apprehensive at the moment because I would thoughly enjoy learning but I need a full time position.... Thanks ladies