I'm Godmother to my older nephew. You might want to touch base with the church the ceremony will be in. My church required a Godparenting class be held before the ceremony.

When my nephew was a tot, I'd send him a 'baptism anniversary' present -- a Bible stories book, one year a Noah's Ark, and be there as a resource for him.

A friend who is many times over a Godmother, has a chart in her bedroom of each Godchild, with birthdates, school status, anniversaries, etc and prays for each child daily. A lovely thought, especially if your memory is as scatty as mine. (I can handle one Godchild, so no chart yet.)

It's quite an honor. Congratulations!