I jumped back into Persona 5 for obvious reasons - I'm really enjoying the game so far, with the exception of how the game requires you to be insanely efficient with your free time. When I look at what other players have done at the point that I'm at, they're doing things that are downright impossible for me at the moment because I haven't leveled up certain stats enough.
I keep trying to increase my Knowledge, Kindness, Guts, etc., but no matter how many times the game says that they go up, they still stay at level one and that point of the star doesn't seem to get any longer.