If I apply to an airline to become a pilot but have no flying experience and haven't studied aviation, I guess it's the airline's problem and not mine.
Uhm... but I don't think that's the situation Marvel wants? They need new audience, not only fans who have seen a dozen movies they've made before (though movies about new character will attract new audience just fine)
But I totally agree with the idea that Marvel needs something fresh after Infinity War, which is probably what they're thinking about.
						
) and he was able to follow it fine and said it wasn't too confusing 
 The overall plot is pretty straightforward and Cap and IM are iconic enough that the average person kinda knows who they are. My buddy had 2 or 3 questions after the movie but they were all about more minor plot points. Except for those that like to focus on the smallest details (the average viewer doesn't do that btw), I think most viewers new to the MCU should still be able to enjoy this film.