If possible, I recommend laughing gas instead of going under. In my opinion it makes heal-time faster, but it's really dependent on the individual.
You really have no need to worry. I have been the dental assistant at a handful of wisdom teeth extractions. They are typically very quick.
I recommend stocking up on easy to eat foods that require little to no chewing. Do not smoke, suck on a straw, etc as that will cause problems with the healing.
You may do just fine. I had mine out (all four) and ate steak and potatoes that night for dinner. I had no pain and the healing time was extremely quick.
Definitely pack some napkins/kleenex/guaze for the drive home. Some people bleed like it's going out of style. And don't try to eat anything for a while, your lower lip will be useless and numb. ;)