When you have a child as cute as your baby, it's inevitable that someone is going to one day want her to perform. It might be on a stage, at a wedding, or in any kind of spotlight, and it's going to be a glorious debut. It probably won't, however, be the easiest thing in the world. Not just because you'll be overwhelmed with the sheer talent your little one displays, though that's certainly possible. No, this will be difficult for a few reasons, but awesome for even more, other reasons!
Hopefully figuratively, but who knows, kids' plays are getting more advanced every day! What this means is that this performance might not just be your baby in your backyard doing her one-girl show. If it's a wedding, a play, or anything involving other people, the stakes are higher, and the role your baby plays becomes a little more complicated. You'll want to make sure that she understands her part in this shindig, even if it's just being towed in a wagon looking cute.
And that's normal! Stage fright is common for people of all ages, and your baby is pretty new to this whole performance thing. You can help her feel more at ease by explaining that everyone is excited to see her, but that she can go at her own pace. If it helps, she can focus on a goal, like getting to the end of the aisle or making sure a person in the last row can hear her. If she gets nervous, she can always look at you!
Unless your baby is doing her first improv show (which, wow, that's impressive!), there will probably be some element of memorization in her first performance. your baby could be reciting a poem, repeating some sweet dance moves, or just remembering to toss all of the flowers out of a basket. It's not the end of the world if she forgets a thing or two, but you might want to have cues ready to help her if she seems to be forgetting her part. If it's a relatively simple performance, you could work on one short phrase to remember as it goes on, like "Keep waving!" or "Follow your teacher!" or "Toss the petals!"