Which Hellboy storyline is a good starting point for reading online?

For a good starting point, many recommend the 'Right Hand of Darkness' storyline. It's a classic and well-regarded arc that introduces key characters and explores important aspects of Hellboy's mythology. Another popular choice is 'The Devil You Know,' which features a compelling mystery and excellent artwork. You can usually find these storylines available individually or in trade paperback collections on the platforms mentioned previously.