Be upfront about other things going on in your life and your current workload:
After reading the previous few blog posts I hope you have realized that a lack of writing skill and a little fear of public speaking should not keep you from going on the amateur officiant journey! These issues can be pretty easily navigated. However, there is a conflict worth considering. Do you have the time to be an amateur officiant?
Are your other commitments and obligations going to allow you to put your all into this project? What is your work schedule like? What's going on at home? Do you have a trip or large project that coincides with the wedding schedule? Have you committed to other projects lately that you have not been able to complete because of time issues?
All in all, being an amateur officiant can be somewhat time consuming. The pre-interview, writing the ceremony, editing the ceremony, practicing the ceremony, rehearsal, and the big day can really add up. If you are already swamped, you may not have the focus needed to effectively perform your duties. Communicate these concerns with the couple. Either find way to make time, or let the bride/groom know that you are honored but won’t be able to give the ceremony the attention it deserves. Unless the couple chooses to have a very small, simple, and short service, being an amateur officiant will take about the same time/commitment as being a best man/maid of honor, so be prepared.
The First-Time Officiant eBook outlines in great detail the steps and time that will be required to deliver a great ceremony and may give you better insight as to whether or not it is something you can put on your plate.