Nextion + ESP32

Hey guys

I try to connect my Nextion display with my ESP32.

-I already build an UI with the Nextion editor
-I already wire-connected the EPS32 and Nextion (hopefully correct) together.

For the beginning i have one button. When i touch the button the Arduino SerialMonitor should
write me some random string, and when i touch it again another ( for example on and off). So i just wanna see if they talk to each other

My quesition now. What lib should i use?
Is there maybe some examplecode?

I am a bit confused