I'd jump in, these games are a real chore to play from scratch the more content there is. All the running around the map, and it can sometimes be a pain to stick to the walkthrough too. Since later quests get randomly triggered while you're doing early contentMan, what a bad time to tear through LE, ToN, and TGO in like a 2 week window.
Can't decide whether to just jump in sub-50% finished or wait a year and hope I remember this series exists.