Follow tutorial to change home page

home/migrations/0003_homepage_body.py

+# Generated by Django 3.0.5 on 2020-04-16 15:07
+
+import wagtail.core.fields
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("home", "0002_create_homepage"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="homepage",
+            name="body",
+            field=wagtail.core.fields.RichTextField(blank=True),
+        ),
+    ]

home/models.py

-from django.db import models
+from wagtail.admin.edit_handlers import FieldPanel
+from wagtail.core.fields import RichTextField
 from wagtail.core.models import Page
 
 
 class HomePage(Page):
-    pass
+    body = RichTextField(blank=True)
+
+    content_panels = Page.content_panels + [
+        FieldPanel("body", classname="full"),
+    ]

home/templates/home/home_page.html

 {% extends "base.html" %}
-{% load static %}
 
-{% block body_class %}template-homepage{% endblock %}
-
-{% block extra_css %}
+{% load wagtailcore_tags %}
 
-{% comment %}
-Delete the line below if you're just getting started and want to remove the welcome screen!
-{% endcomment %}
-<link rel="stylesheet" href="{% static 'css/welcome_page.css' %}">
-{% endblock extra_css %}
+{% block body_class %}template-homepage{% endblock %}
 
 {% block content %}
-
-{% comment %}
-Delete the line below if you're just getting started and want to remove the welcome screen!
-{% endcomment %}
-{% include 'home/welcome_page.html' %}
-
-{% endblock content %}
+    {{ page.body|richtext }}
+{% endblock %}