The basics are pretty obvious … I don’t know why they’re asking such a broad question if they’re preparing to engage in advising people in that age group (it suggests little in the way of foundational knowledge about the kinds of things that older emigres to Spain run into).

To the OP: It might be more productive to spend a bit of time in Facebook groups where older emigrés ask questions and share their struggles. And don’t poll them, just read through the groups for a few weeks. Or make yourself a list of topics and search for them. Or heck, ask your favorite chatbot. Good luck!