My advice as I had the same mental reservations about riding to work, I actually rode to work on a day that I did not have to be there just to see how long it would take and I did it at the time I normally would be going to see what the traffic is like. Doing that and all of the support from the guys who are veterans of commuting, and the drive to want to do it, will get you through it.
take the plunge, I did and feel great about it.