Before you begin, I'd like to emphasise the significance of keeping good notes. When I started learning ethical hacking, I made the mistake of rushing through the course without taking notes. This was a big mistake because I couldn't recall anything after finishing the course and had no notes to refer to when I needed them. Several good options for managing your notes include KeepNote, CherryTree, Joplin, Notion, OneNote, Google Keep and Obsidian. For taking screenshots for my notes, I use Greenshot, but there is a tool called Flameshot for Linux and Mac users. As for organising my notes, I rely on Notion. Of course, you can use any app or tool that works best for you. The key takeaway is that effective note-keeping is important when studying this field.
Note-taking applications
Screenshot tools