Delightful second mind if you learn to use it!
Notion seems like THE recommended tool by many of the productivity geeks nowadays. As a developer myself, seeing Notion get new and better features all the time as well as support for professional tools such as automations and database-like data managements is absolutely delightful.
I used it to track many aspects of my university journey as well as building a virtual library for my physical books and notes. I was constantly surprised that "omg.. it can also do this!"