Use ESP8266 with teensy 3.5

Hello everyone,
I'm using Teensy 3.5 and programming in Arduino 1.8.9 IDE.
I want to wire data (from the teensy) to ESP8266 v3 and transmit it to a web browser.

I've been watching all kinds of youtube videos and nothing helped me to understand how to manage this project.

Is anyone here knows or experienced with this kind of a project?