Can we get an in-game sticky note/reminder function?

[Iscah]

/echo just sends it to your chat, not the party chat. You'd need to use /p for that to happen.

You don't "need to use /p" to accidentally send things to party chat - you just need to forget to put something else.

Is there a way to write that where I don't share my note with the party when I click on it?

The easiest way is to set up your "sticky note" macro in advance with /e (for "echo") at the start of every line to ensure that particular line will always display as echo text regardless of your current chat channel.

I have a blank one saved as a template and I'll copy it to another slot if I want to start taking notes.