For the most part, Invincible Season 2 adheres closely to the comic. There are a few minor tweaks for the sake of TV storytelling, but the core elements remain the same.
Well, the progress of Invincible Season 2 in the comics can be a bit complex. Different issues might cover different amounts of story, and it's not straightforward to measure precisely.
I don't have the exact information. You might want to check the official comic publisher's website or related fan forums for the most up-to-date details.
The distance in Season 2 of Invincible comics is relative. Some storylines have advanced significantly, while others are still unfolding. It's a complex mix.
To a certain extent, it's a true story. But like many such tales, it may have incorporated some fictional elements to make it more engaging or to fill in gaps in the known facts.