Read the directions that came with your pills - different ones have different ways to handle this. The most common, though, is to double up on your pills for 2 days. So today take Sunday and Monday's, and tomorrow take Tuesday and Wednesday's. Or you could just start with today's pill only. As it's only the first 2 days of the pack, I wouldn't be too concerned about it. you should always use a backup method for about 10-14 days anytime you mess with your birth control - whether it's switching brands or missing a day. You usually don't ovulate until about the second week of your cycle, anyway, so the odds are in your favor that you are fine.
Although the directions tell you of dire consequences if you don't take it at the same time everyday, I wouldn't worry too much about that. It's more important to just get it in your body than it is they are taken exactly 24 hours apart.
It will take you awhile to get used to having to take a pill everyday, so my advice on that is to either keep them in your purse, so they are always with you, or keep them by your toothbrush so you take them every night (or morning).
Good luck!
S.