Where there is a will, there is a way. Old saying, but oh so true. Just go in there and even if you are scared, conquer it. You are not expected to know anything of a particular nature in a new job. Example, I am a bookkeeper/office manager .. BUT every company has their own way of doing things and they will let you know.
You are going to do great. What an opportunity to be able to have a CAREER, not just a job, but a career! Awesome and good luck!
P.S., plus with the cost of gas and the fact that it can and may go MUCH higher, I'd take the job closer to home. Plus, you will have more time to spend with your kids! It's not always about 'financial' rewards, but personal ones too!