Morty's character often develops more confidence. When he time travels, he's forced to make decisions on his own without Rick always there to guide him. For example, if he's in a past where Rick is unavailable, he has to figure out how to deal with the situation. This makes him grow bolder.
There are indeed Rick and Morty comics. They're a great way for fans to immerse themselves deeper into the world of Rick and Morty. The comics sometimes explore concepts and characters that might not have been featured prominently in the show.
One interesting plot could be Morty traveling back in time to prevent Rick from creating a certain dangerous invention. This would lead to a whole new set of adventures as Morty tries to change the past without messing up the entire timeline. Another plot might be Morty getting stuck in different time periods and having to find his way back to his own time with the help of various versions of Rick he meets along the way.
Rick and Morty didn't start as a comic. It first gained popularity as an animated series. The show's unique storyline and characters made it a hit before any comic adaptations were made.
I'm not aware of any Rick and Morty comic in the newspaper. Maybe it's possible in some very specific or niche newspapers, but it's not a common occurrence.
I think they're good. The comics expand on the universe of the show and offer new adventures for the characters. The humor and creativity are still top-notch.