I would say that if you end up really liking Legend of the Legendary Heroes (if you watch the anime, watch at least 3 episodes before deciding what you think of it, trust me) then give the first chapter/episode of Seraph a shot and see how that goes. It does a great job of setting up exactly what kind of convoluted mess of a story you're in for.

THANKFULLY I can read Japanese reasonably well to get through them on my own, but I know many people aren't so fortunate.

Haha, it's fine! I've been replying inbetween tags because the collective Fate/ cast is having a minor explosion ICly right now haha.