Is there such a thing as “too early”?

Hey all, Just curious some general advices or discussions on if you believe your child or children in general should stick to certain areas for their age. Like developing wise. My son is almost 14 mos and walking around so good- is this too early to start potty training? Were you told your child was too young or it was too early to start the next stages? I also have other kids to think about as far as books, reading, drawing… I feel like society looks down on parents who push too hard but how to tell when to push and when they are bored or something is hard.