i wasnt all that nervous, but everyone is different. really dont think so much about the fact that you are driving, just focus on the traffic and the cars around you. if you do that then you will be fine. as for going 60...its really not that bad. going 40 on a 4wheeler is like going 140 in a car. plus on that four wheeler you probably werent driving on a road.

you will be fine! but good luck all the same