Hi 
For me, the best thing about Hive is that there’s a place for everyone, because we can all contribute in any of its many different ways. You don’t need to be a great writer or the best photographer, just be yourself and connect genuinely with other users. Your niece will guide you well, she’s a very experienced user, so, to avoid overwhelming you with more information than you need, I’ll just leave you with a couple of useful links and invite you to explore the communities I’ve linked to below. Have fun!
Tips and information as a Hive newbie here: newbie guide.
Communities you might like that are part of the OCD Communities Incubation Program. Important: read their rules and post in the one that fits your content.
Have a good day!
RE: Discovering Hive through the First Context: My Introduction/eng-spn💪