after installing the plugin by using plugin configuration

launch by using the blue ocean button

Then let’s « create our first pipeline »

First job : configure where the code is … github is an easy way

you must create a file Jenkinsfile in your repo

Jenkinsfile :

pipeline {
     agent any
stages {
    stage('Build') {
        steps {
            echo 'Building..'
        }
    }
    stage('Test') {
        steps {
            echo 'Testing..'
        }
    }
    stage('Deploy') {
        steps {
            echo 'Deploying....'
        }
    }
}

first pipeline created : well done !