Q. Can I add an internal note in a member's profile with an alarm or notification to remember?

A. Notes are only records of some kind of information on the member's profile.

However, you can use the Tasks feature where you can add an action for that member against a specific date. In the Members => Member Tasks area, staff will be able to see these tasks in the to-do list with the key information, and can then complete them once have been actioned.