Be patient, and that is on several levels:
-American Football has the most complicated set of rules of all team sports in the world. You will always be learning rules, and refreshing your memory on rules, over your entire career (especially the way rules change every year). You must know rules. To that end, you must be constantly diligent in their study. But, no one expects you to be expert in your first season, or second, or third... Get there as quickly as you can, but don't expect that it will come quickly or easily.
-If you have aspirations of working at the NCAA or NFL levels, be really patient. It will be some years before you are in a position to make any kind of a move like that. Be willing to work anywhere, any time, and don't be concerned about how much it pays. Just do it. That takes sacrifice. Family is #1, no question. But, you will find yourself in positions requiring you to miss a birthday or an anniversary from time to time. You have to find a way to compensate, IF YOU WANT IT. If you can't, or choose not to, no one will think less of you. Just don't complain about why you aren't 'there.' And just because you get invited to work a college scrimmage or something, don't expect that you'll get the call the next season. You may have to work that circuit for quite a few years before the stars align just right for you. But, you won't even be in the heavens if you don't perservere. Patience. Perservence. Practice.
Be happy. No one likes the guy that complains and whines. If you find yourself in that trap, just think about the guys in Iraq or Afghanistan that are getting shot at to protect your liberty to be a football official on Friday nights in the fall. They'd love to trade places with you. You don't have it so rough.
Have fun. That means differnt things to each of us, but find your way to have fun, while being professional.
Now, go forth and officiate.