Andrew Price is one of Blenders best teachers and promotors. Years ago he created an excellent Blender tutorial for beginners where he showed how to create a simple donut. He has now updated the series to fit the current version of Blender (2.8). He's been releasing them pretty much every day. Here are the first four tutorials in the series from Andrew's YouTube channel.
Visit Andrew's YouTube channel for an amazing amount of tutorials for Blender. He's really one of the best teachers around.