I would like to know at what age your type generally becomes established i.e. noticable enough for identification.

Is it correct to say that a young child is in some kind of flux of their functions until their type becomes established?

I once read on the Jung that we develop our functions naturally over time so for example, my "midlife crisis" will actually be the rising of my PoLR where I might face the dillemma that I want to start living life more. Does this hold true for Socionics i.e. am i on a natural path of development as well as a nurtured path if i recognise my weak functions and work with them now?