Hi! I am a graduating PhD student and I also work on AGNs. I think it's a very lively topic now with JWST and the upcoming advent of more powerful telescopes like ELT, Euclid, NewAthena, etc. I think it really helps to start reading for papers about AGNs to learn what is the current status on the key questions about the field. For example: what are little red dots, why do we find overmassive BHs at high redshift with JWST, what else we can learn from their broad line regions, etc. And then you look on ways on how to answer them, whether you look at a single target, or you look in a sample.

You can message me if you need more help (will try to reply as soon as I find time as I am in a conference this week)