The best way to read JoJo manga in order is to begin from the very beginning. Each part builds on the previous ones, so following the chronological sequence will give you the fullest understanding of the story and character development. Start with 'Phantom Blood' and move forward chronologically.
The JoJo manga is mainly in black and white. Colored versions exist but are not the norm. Sometimes, colored illustrations are done for promotional purposes or by fans.
I think it's great. The characters are memorable, the plot is full of twists and turns, and the battles are epic. It's a manga that stands out from the crowd.
It depends on personal preferences. Some consider Jojo to be peak fiction for its unique style and engaging storylines. Others may have different opinions.