These Obsidian plugins are a great way to start creating a vault of notes that makes learning, doing, and organizing a whole lot easier. The Obsidian community has a ton more plugins to choose from. I recommend taking a look.
Obsidian has a large community of plugin contributors that can be accessed and downloaded in the settings page (the gear icon at the lower left hand corner). Navigate to βCommunity pluginsβ and toggle βSafe modeβ off.