Yes — Berserk isn't just worth reading, the manga is the whole point. The 1997 anime is a beautiful trailer.
Where to start: from chapter 1. The anime skipped the Black Swordsman prologue, softened several events, and cut the Skull Knight, Puck, and the entire supernatural framing that makes the Eclipse land differently. Golden Age in the manga is richer even where you know the plot.
What you get after the anime's endpoint: Conviction and Millennium Falcon are widely considered peak dark fantasy — and Miura's art evolves into some of the most detailed panel work ever put in a manga. It gets genuinely breathtaking.
State of the series: after Kentaro Miura passed in 2021, his childhood friend Kouji Mori (who knew the intended ending) supervises the continuation, drawn by Miura's Studio Gaga assistants. It resumed with the Fantasia arc and releases slowly but steadily. The transition chapters are respectful; you can feel the team's care.
Budget your heart accordingly. The manga goes darker than the anime ever did — and also, eventually, warmer than you'd expect.