I was wondering whether anyone had any reference to suggest to me on how people pay and express their condolences in "real life", therefore f2f and written communication, and on social media.
You have gotten very good resources from Harshvardhan. I can only add that teenagers in school can also use it to deal with similar issues regarding their classmates, perhaps, those who might have attempted suicide. An example of how Social Media was used to engage students in their popular communication space can help to show the process to be used: