Sure it's okay that you'll hire someone and pay him/her to tackle all the details and issues; but many couples have made this costly mistake of leaving all the work to the coordinator. Not that the coordinator cannot handle it or that he/she cannot be trusted; it's just that it's not reason enough to let someone handle everything. It is ideal that you and your wedding coordinator have each a copy of your wedding checklist where you can tally each month or every 2 weeks as things progress. Yes, it is tedious and it could bring stress once in a while, but you've got to be always on top of the situation because it is your wedding. You need to have an understanding with your coordinator regarding the updates and tallying of details in order to ensure that every bit of detail, big or small, is being tackled and accomplished as needed.
Create a checklist right now. Write down all of the things you think you need to do between now and the day of the big event. Of course, not all parties need a comprehensive list with timing deadlines. For example, if you were throwing an impromptu get_together with your friends, and you were doing a Mexican_themed party, with Mexican food and margaritas, you would want to make a list of everything you needed from the store. Granted, this is an oversimplification of what goes into planning a party, but you get the idea. The list will help you to remember everything you need for your party to be a success. When creating a party planning checklist for a really important event, like someone's 50th wedding anniversary or a retirement party, there are two extremely important items you need to have on that checklist before anything else: the budget and the guest list.