Note-taking tips and tools
Actually Obsidian notes are just text files in Markdown format so you can edit them however your want or create them or do anything you want with them without the Obsidian app. They do have a proprietary linking syntax [] for linking to other notes in the vault but that's a key feature. :-)
"Personal engineering" doesn't sound quite right, unless you are building something? But there is a (somewhat fuzzy) distinction between more pure science and "applied science", maybe that is useful here...
Started using Obsidian six months ago and haven't looked back.