+1 for nofels, sorry nofelau, but I would also like to read something positive and life-affirming, perhaps with a laugh or two ).
Related to this, and I don't know if it's possible to cover in a 5 minute talk, something about the kind of written Welsh that learners can expect when they first start reading.
It took me a long time to get my head around this (and I'm still learning) - that there is "proper" literary Welsh, and then there is colloquial Welsh in a written form, and then there seems to be a whole spectrum in between. And (so it seems to me) modern writers sort of choose a range of that spectrum to inhabit. It probably depends partly on how much dialogue there is (in a novel), and how colloquial they want to make the dialogue.
I don't know if there is anything useful on that subject that one can say in five minutes, but maybe it's food for thought.
Also perhaps, suggested authors for beginning readers to try.