[varbhat]

Looks nice but that is paid service. Unfortunately i can't afford.

[jackofalltrades]

If you use macOS and/or iOS check FSNotes out: https://fsnot.es/

It's really powerful if you go through all of it's capabilities, but can be used quite simply too.

[meremortals]

consider Foam: https://github.com/foambubble/foam or TiddlyRoam: https://joekroese.github.io/tiddlyroam/