What do you need to know?
WordPress Learning Resources
Video Tutorials
WPBeginner.com has a great series of very basic videos that are good to start your learning journey. You will need to create a free account to get access. WPBeginner videos.
Stackable™ Blocks
SereneColombo.org uses a block plugin called Stackable. You can recognize those blocks from their multi-coloured icons:
Stackable buttons can have icons as shown above. To see all the free icons available check here.