I think that you are using the wrong metrics.

Defining the results achieved by a certain age is a different thing than defining the qualities that you seek to nurture.

By setting results based goals, you are putting your child in a subordinate pass/fail position.

Who are you to define success for your child? It is their life.

By defining some qualities that you would like to nurture in your child, and implementing strategies to help them develop, you would be acting as a supportive participant in their development.

Milestone thinking can be very dangerous in this context.