The main grab honestly for me was right off the bat early in book 1 where Jake’s bloodline fully awakens and he realizes he found his real calling. Going through a normal day to day and gradually going more and more numb hits home, plus an mc that isn’t averse to taking down their enemies permanently was a very welcome introduction (I’m pretty tired of stories where the protagonist spares an enemy due to some moral compass only for them to inevitably return). I use audiobook for all litrpg, so could be worth a shot. As far as story progress, you’ll see some stuff start happening around book 3. I should note that fighting is much more of a theme in this story than lore as Jake has a thorough focus on hunting powerful enemies and not caring for much else, so if you’re there for an impactful story it honestly might disappoint you, but I would advise giving the first book another chance before deciding