Hey, imho best overall technical intro to LLMs (I guess that´s your main interest as you mentioned qlora + llama) is by Simon Willis [1]. Additionally or if you prefer videos, the recent 1h "busy persons intro" by Andrei Karpathy is great + dense as well [2].
EDIT: Maybe I misunderstood as you asked about papers, not general intros.
I don´t think that reading papers is the best way to "catch up" as the pace is rapid and knowledge very decentralized. I can confirm what Andrej recently wrote on X [3]:
"Unknown to many people, a growing amount of alpha is now outside of Arxiv, sources include but are not limited to: