Buffalo, darling, I hope you get over your fear of the unknown, otherwise you will be afraid your entire life! Accepting or declining a job is something done by millions everyday. Being risk-averse is a different matter altogether, but if you have weighed the pros and cons, and gone into the decision armed with all the relevant information and with your eyes open, you should be able to sleep at night.

If offered a job, you can decline it. If you accept it, you can decline it later. All kinds of options available to you. Good luck in your choice(s).