The funniest role, in my opinion, is Margot Robbie's, because she was just cut out of the film in the end and put in another performance, which is why her mother died in the film.
The easiest to follow is the love line between the military photojournalist Odie and the actress Midge, there it is generally clear. The love line between the young teacher and Montana is not very visible, but in general, it is also guessable.
Note that the actors seem to "overplay", exaggerate, dramatise, speak too clearly, round their eyes too much. This is also "so intended", because, firstly, such play is in the Wes Anderson code, and secondly, they do not hide the fact that they are actors, and they play roles.
For example, when Midge sees Odie burn himself and shouts: "You really did it", it's actually Mercedes screaming because the actor really did burn himself.