Man, trying to find the right historical fiction series to start with is like trying to choose a pastry at a bakery—everything looks good, but you don’t want to commit to something too heavy right off the bat. I’d steer clear of the massive multi-volume sagas at first. A lot of folks will shout about 'The Last Kingdom' or 'Outlander,' and while they’re fantastic, the sheer page count can be intimidating.
Instead, I’d point someone to Bernard Cornwell’s 'Sharpe' series. It’s military historical fiction set during the Napoleonic Wars, but each book is a pretty self-contained adventure. You get the historical detail without feeling like you’ve signed up for a twenty-year reading project. The prose is direct and propulsive, not bogged down by endless exposition. Starting with 'Sharpe's Eagle' gives you a perfect taste—if you love the blend of battle tactics and character, you’ve got a huge backlist to explore, but if it’s not your thing, you’re not left hanging in the middle of some epic, unresolved family saga. Plus, Sean Bean’s TV portrayal adds a fun visual reference.