Nothing Weird about you! Many of us are uncomfortable in a "new" environment!!
Please remember that everyone else there had a first time too...! If you have a question, don't be shy about asking the first person you encounter; and if they don't have an answer, then ask another. (Its a great way to meet folks, by saying "I'm new here....") Best of all- remember it will only be "new" for the first lap around that track.
Trust yourself--you can do this!!
A quick and serious question for you though...you said you are afraid you might actually pass out because you are so out of shape? Have you checked in with your doctor about starting this exercise?? If not, then I sincerely hope you will !! But waiting to talk to them before actually exercising shouldn't stop you from going down to the track TOMORROW as you planned, and checking it all out. Doing even that much will take much of your anxiety away.
Take care, and enjoy your new adventure at the track. Let us know how it goes!!