I recently found something called Notion and I'm in love?

Its free plan has EVERYTHING a single person could need to plan/organize/schedule whatever they want a hundred times over. I'm seriously obsessed. I've been using it to schedule the upcoming semester, plan my birthday, write a list of TV shows and movies I've watched, manage my spending habits, etc

I may be a bit biased but the fact that it's completely customizable to your needs and there are a ton of free templates has me OBSESSED.

Couldn't recommend more tbh