Tips for traveling in the airport with one year old?

Hello everybody, I’m looking for tips that could help make a better flight for me and everybody else around me.

My daughter is one years old. She’s never been on an airplane before, and I’m just really nervous about what might happen. I’m hoping she can cooperate during the whole duration of the flight but I’m so unsure of what might happen. I’m hoping for her to be sleeping, but if that doesn’t work out. What can help me calm her down if anything was to ever happen?

I’m overthinking about this. My flight is only 2 & 1/2 hours. I just really hope nobody yells at me because my daughter doesn’t want to cooperate or if her ears are topped and she can’t pop them on her own! Please help with tips