Hey - congratulations!
The logistics of performing in public (setting up on stage, dealing with sound systems, etc.) get easier the more you do it. And you will also become a better "performer" - i.e. the way you relate to the audience, move on stage, etc.
The nerves are actually a good thing (as long as they don't completely overwhelm you), because they give some "edge" to your performance. It isn't good to become completely comfortable on stage.
I hope you have many successful performances in your future!
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"I am likely to miss the main event, if I stop to cry & complain again.
So I will keep a deliberate pace - Let the damn breeze dry my face."
- Fiona Apple - "Better Version of Me"