Learn from the very basics to the advanced things of Drupal 8/9. All Drupal tutorials on here are free of charge. If for some reason you'd like to see a particular Drupal 7 tutorial, please do get in touch.
Drupal 9 Course: Create a Config Page - Part 3 - 
We want to create a very simple configuration page for our API module.
How to create a user programmatically in Drupal 8 and 9
This tutorial will show you how easy it is to create a user.
How to get current URL - Drupal 8 & 9
Neat little code snippet to get the full URL of any Drupal (v8 & v9) page.
Drupal 9 Course: Create a Custom Page - Part 2 - 
We will start off by creating a custom page, later on, this custom page will display a list of movies from the movie API.
Drupal 9 Course: Create & Enable Custom Module - [Part 1]
We will be creating the bare skeletons needed to enable a custom module